diff --git a/lib/rpc-client/client.js b/lib/rpc-client/client.js
index 50ecf59..498116b 100644
--- a/lib/rpc-client/client.js
+++ b/lib/rpc-client/client.js
@@ -107,6 +107,16 @@ pro.addProxies = function(records) {
   }
 };
 
+/**
+ * Add new remote server to the rpc client.
+ *
+ * @param {Object} server new server information
+ */
+pro.addServer = function(server) {
+  this._station.addServer(server);
+};
+
+
 /**
  * Replace remote servers.
  *
@@ -130,7 +140,7 @@ pro.rpcInvoke = function(serverId, msg, cb) {
   if(this.state !== STATE_STARTED) {
     tracer.error('client', __filename, 'rpcInvoke', 'fail to do rpc invoke for client is not running');
     logger.error('[pomelo-rpc] fail to do rpc invoke for client is not running');
-    cb(new Error('[pomelo-rpc] fail to do rpc invoke for client is not running'));
+    utils.invokeCallback(cb,new Error('[pomelo-rpc] fail to do rpc invoke for client is not running'));
     return;
   }
   this._station.dispatch(tracer, serverId, msg, this.opts, cb);
@@ -237,13 +247,16 @@ var proxyCB = function(client, serviceName, methodName, args, attach, isToSpecif
     logger.error('[pomelo-rpc] fail to invoke rpc proxy for client is not running');
     return;
   }
-  if(args.length < 2) {
-    logger.error('[pomelo-rpc] invalid rpc invoke, arguments length less than 2, namespace: %j, serverType, %j, serviceName: %j, methodName: %j',
+  if(args.length < 1) {
+    logger.error('[pomelo-rpc] invalid rpc invoke, arguments length less than 1, namespace: %j, serverType, %j, serviceName: %j, methodName: %j',
       attach.namespace, attach.serverType, serviceName, methodName);
     return;
   }
   var routeParam = args.shift();
-  var cb = args.pop();
+  var cb;
+  if(typeof args[args.length-1]=='function'){
+    cb = args.pop();
+  }
   var serverType = attach.serverType;
   var msg = {namespace: attach.namespace, serverType: serverType,
     service: serviceName, method: methodName, args: args};
diff --git a/lib/rpc-client/mailboxes/tcp-mailbox.js b/lib/rpc-client/mailboxes/tcp-mailbox.js
index 015e233..91b6cc3 100644
--- a/lib/rpc-client/mailboxes/tcp-mailbox.js
+++ b/lib/rpc-client/mailboxes/tcp-mailbox.js
@@ -148,9 +148,15 @@ pro.connect = function(tracer, cb) {
     return;
   }
 
-  var id = this.curId++ & 0xffffffff;
-  this.requests[id] = cb;
-  setCbTimeout(this, id, tracer, cb);
+  var id = 0;
+  if(cb){
+      id = this.curId++ & 0xffffffff;
+      if(!id){
+          id = this.curId++ & 0xffffffff;
+      }
+      this.requests[id] = cb;
+      setCbTimeout(this, id, tracer, cb);
+  }
   var pkg;
 
   if(tracer.isEnabled) {
diff --git a/lib/rpc-client/mailboxes/ws-mailbox.js b/lib/rpc-client/mailboxes/ws-mailbox.js
index a336532..0d4824c 100644
--- a/lib/rpc-client/mailboxes/ws-mailbox.js
+++ b/lib/rpc-client/mailboxes/ws-mailbox.js
@@ -147,9 +147,16 @@ pro.connect = function(tracer, cb) {
   }
   
   var self = this;
-  var id = this.curId++;
-  this.requests[id] = cb;
-  setCbTimeout(this, id, tracer, cb);
+  var id = 0;
+  if(cb){
+      id = this.curId++;
+      if(!id){
+          id = this.curId++;
+      }
+      this.requests[id] = cb;
+      setCbTimeout(this, id, tracer, cb);
+  }
+
 
   var pkg;
   if(tracer.isEnabled) {
diff --git a/lib/rpc-client/mailstation.js b/lib/rpc-client/mailstation.js
index 38b3b94..cda5d5b 100644
--- a/lib/rpc-client/mailstation.js
+++ b/lib/rpc-client/mailstation.js
@@ -106,6 +106,28 @@ pro.clearStation = function() {
   this.serversMap = {};
 };
 
+/**
+ * Add a new server info into the mail station.
+ *
+ * @param {Object} serverInfo server info such as {id, host, port}
+ */
+pro.addServer = function(serverInfo) {
+  if(!serverInfo || !serverInfo.id) {
+    return;
+  }
+
+  var id = serverInfo.id;
+  var type = serverInfo.serverType;
+  this.servers[id] = serverInfo;
+
+  if(!this.serversMap[type]) {
+    this.serversMap[type] = [];
+  }
+  this.serversMap[type].push(id);
+  this.emit('addServer', id);
+};
+
+
 /**
  * Replace remote servers info.
  *
@@ -183,7 +205,7 @@ pro.dispatch = function(tracer, serverId, msg, opts, cb) {
       self.emit('error', constants.RPC_ERROR.FAIL_FIND_MAILBOX, tracer, serverId, msg, opts);
       return;
     }
-    mailbox.send(tracer, msg, opts, function() {
+    var callback = function() {
       var tracer_send = arguments[0];
       var send_err = arguments[1];
       if(!!send_err) {
@@ -198,7 +220,8 @@ pro.dispatch = function(tracer, serverId, msg, opts, cb) {
         }
         utils.applyCallback(cb, args);
       });
-    });
+    };
+    mailbox.send(tracer, msg, opts,cb?callback:null);
   };
 
   doFilter(tracer, null, serverId, msg, opts, this.befores, 0, 'before', send);
@@ -255,8 +278,8 @@ pro.connect = function(tracer, serverId, cb) {
   var mailbox = self.mailboxesMap[serverId];
   mailbox.connect(tracer, function(err) {
     if(!!err) {
-      tracer.error('client', __filename, 'lazyConnect', 'fail to connect to remote server: ' + serverId);
-      logger.error('[pomelo-rpc] mailbox fail to connect to remote server: ' + serverId);
+      tracer.error('client', __filename, 'lazyConnect', 'fail to connect to remote server: ' + serverId+' host:'+mailbox.host+' port:'+mailbox.port);
+      logger.error('[pomelo-rpc] mailbox fail to connect to remote server: ' + serverId +' host:'+mailbox.host+' port:'+mailbox.port);
       if(!!self.mailboxesMap[serverId]) {
         delete self.mailboxesMap[serverId];
       }
@@ -322,6 +345,7 @@ var lazyConnect = function(tracer, station, serverId, factory, cb) {
   var server = station.servers[serverId];
   if(!server) {
     logger.error('[pomelo-rpc] unknown server: %s', serverId);
+    return false;
   }
   var mailbox = factory.create(server, station.opts);
   station.connecting[serverId] = true;
diff --git a/lib/rpc-server/acceptors/tcp-acceptor.js b/lib/rpc-server/acceptors/tcp-acceptor.js
index 820416c..d27412a 100644
--- a/lib/rpc-server/acceptors/tcp-acceptor.js
+++ b/lib/rpc-server/acceptors/tcp-acceptor.js
@@ -81,7 +81,7 @@ pro.listen = function(port) {
         } catch(err) { //json parse exception 
           if(err) {
             socket.composer.reset();
-            logger.error(err);
+            logger.error(err.stack);
           }
         }
       }
@@ -179,30 +179,33 @@ var cloneError = function(origin) {
   };
   return res;
 };
+
+var respCallback = function(socket, acceptor, pkg,tracer,id) {
+  var args = Array.prototype.slice.call(arguments, 5);
+  for(var i=0, l=args.length; i<l; i++) {
+    if(args[i] instanceof Error) {
+      args[i] = cloneError(args[i]);
+    }
+  }
+  var resp;
+  if(tracer.isEnabled) {
+    resp = {traceId: tracer.id, seqId: tracer.seq, source: tracer.source, id: pkg.id, resp: Array.prototype.slice.call(args, 0)};
+  }
+  else {
+    resp = {id: pkg.id, resp: Array.prototype.slice.call(args, 0)};
+  }
+  if(acceptor.bufferMsg) {
+    enqueue(socket, acceptor, resp);
+  } else {
+    socket.write(socket.composer.compose(RES_TYPE, JSON.stringify(resp), id));
+  }
+};
+
 //need to redefine response
 var processMsg = function(socket, acceptor, pkg, id) {
   var tracer = new Tracer(acceptor.rpcLogger, acceptor.rpcDebugLog, pkg.remote, pkg.source, pkg.msg, pkg.traceId, pkg.seqId);
   tracer.info('server', __filename, 'processMsg', 'tcp-acceptor receive message and try to process message');
-  acceptor.cb.call(null, tracer, pkg.msg, function() {
-    var args = Array.prototype.slice.call(arguments, 0);
-    for(var i=0, l=args.length; i<l; i++) {
-      if(args[i] instanceof Error) {
-        args[i] = cloneError(args[i]);
-      }
-    }
-    var resp;
-    if(tracer.isEnabled) {
-      resp = {traceId: tracer.id, seqId: tracer.seq, source: tracer.source, id: pkg.id, resp: Array.prototype.slice.call(args, 0)};
-    }
-    else {
-      resp = {id: pkg.id, resp: Array.prototype.slice.call(args, 0)};
-    }
-    if(acceptor.bufferMsg) {
-      enqueue(socket, acceptor, resp);
-    } else {
-      socket.write(socket.composer.compose(RES_TYPE, JSON.stringify(resp), id));
-    }
-  });
+  acceptor.cb.call(null, tracer, pkg.msg,pkg.id?respCallback.bind(null,socket,acceptor,pkg,tracer,id):null);
 };
 
 var processMsgs = function(socket, acceptor, pkgs, id) {
diff --git a/lib/rpc-server/acceptors/ws-acceptor.js b/lib/rpc-server/acceptors/ws-acceptor.js
index 1bd876a..17ea0fc 100644
--- a/lib/rpc-server/acceptors/ws-acceptor.js
+++ b/lib/rpc-server/acceptors/ws-acceptor.js
@@ -153,29 +153,32 @@ var cloneError = function(origin) {
   return res;
 };
 
+var respCallback = function(socket,acceptor,pkg,tracer) {
+  var args = Array.prototype.slice.call(arguments, 4);
+  for(var i=0, l=args.length; i<l; i++) {
+    if(args[i] instanceof Error) {
+      args[i] = cloneError(args[i]);
+    }
+  }
+  var resp;
+  if(tracer.isEnabled) {
+    resp = {traceId: tracer.id, seqId: tracer.seq, source: tracer.source, id: pkg.id, resp: Array.prototype.slice.call(args, 0)};
+  }
+  else {
+    resp = {id: pkg.id, resp: Array.prototype.slice.call(args, 0)};
+  }
+  if(acceptor.bufferMsg) {
+    enqueue(socket, acceptor, resp);
+  } else {
+    socket.send(JSON.stringify(resp));
+  }
+};
+
 var processMsg = function(socket, acceptor, pkg) {
   var tracer = new Tracer(acceptor.rpcLogger, acceptor.rpcDebugLog, pkg.remote, pkg.source, pkg.msg, pkg.traceId, pkg.seqId);
   tracer.info('server', __filename, 'processMsg', 'ws-acceptor receive message and try to process message');
-  acceptor.cb.call(null, tracer, pkg.msg, function() {
-    var args = Array.prototype.slice.call(arguments, 0);
-    for(var i=0, l=args.length; i<l; i++) {
-      if(args[i] instanceof Error) {
-        args[i] = cloneError(args[i]);
-      }
-    }
-    var resp;
-    if(tracer.isEnabled) {
-      resp = {traceId: tracer.id, seqId: tracer.seq, source: tracer.source, id: pkg.id, resp: Array.prototype.slice.call(args, 0)};
-    }
-    else {
-      resp = {id: pkg.id, resp: Array.prototype.slice.call(args, 0)};
-    }
-    if(acceptor.bufferMsg) {
-      enqueue(socket, acceptor, resp);
-    } else {
-      socket.send(JSON.stringify(resp));
-    }
-  });
+
+  acceptor.cb.call(null, tracer, pkg.msg, pkg.id?respCallback.bind(null,socket,acceptor,pkg,tracer):null);
 };
 
 /**
diff --git a/lib/rpc-server/dispatcher.js b/lib/rpc-server/dispatcher.js
index 52bd9e2..052412d 100644
--- a/lib/rpc-server/dispatcher.js
+++ b/lib/rpc-server/dispatcher.js
@@ -47,6 +47,8 @@ pro.route = function(tracer, msg, cb) {
   }
 
   var args = msg.args.slice(0);
-  args.push(cb);
+  if(cb){
+    args.push(cb);
+  }
   method.apply(service, args);
 };
diff --git a/lib/rpc-server/gateway.js b/lib/rpc-server/gateway.js
index aa7527f..35ee5f0 100644
--- a/lib/rpc-server/gateway.js
+++ b/lib/rpc-server/gateway.js
@@ -12,9 +12,6 @@ var Gateway = function(opts) {
   this.started = false;
   this.stoped = false;
   this.services = opts.services;
-  if(!!this.opts.reloadRemotes) {
-    watchServices(this, dispatcher);
-  }
   var self = this;
 
   this.acceptors = {};
@@ -35,6 +32,9 @@ var Gateway = function(opts) {
   this.acceptor = this.acceptorFactory.create(opts, function(tracer, msg, cb) {
     dispatcher.route(tracer, msg, cb);
   });
+  if(!!this.opts.reloadRemotes) {
+    watchServices(this, dispatcher);
+  }
 };
 
 util.inherits(Gateway, EventEmitter);
diff --git a/lib/util/proxy.js b/lib/util/proxy.js
index 235c9c0..e35399f 100644
--- a/lib/util/proxy.js
+++ b/lib/util/proxy.js
@@ -29,11 +29,18 @@ exp.create = function(opts) {
 var genObjectProxy = function(serviceName, origin, attach, proxyCB) {
   //generate proxy for function field
   var res = {};
-  for(var field in origin) {
-    if(typeof origin[field] === 'function') {
-      res[field] = genFunctionProxy(serviceName, field, origin, attach, proxyCB);
-    }
+    var keys = Object.getOwnPropertyNames(Object.getPrototypeOf(origin)).concat(Object.getOwnPropertyNames(origin));
+    for(var i in keys){
+        var field = keys[i];
+      if(typeof origin[field] === 'function') {
+          res[field] = genFunctionProxy(serviceName, field, origin, attach, proxyCB);
+      }
   }
+  // for(var field in origin) {
+  //   if(typeof origin[field] === 'function') {
+  //     res[field] = genFunctionProxy(serviceName, field, origin, attach, proxyCB);
+  //   }
+  // }
 
   return res;
 };
diff --git a/package.json b/package.json
index 68e1cd6..194c6ee 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
 	"name": "pomelo-rpc",
 	"version": "1.0.2",
 	"dependencies": {
-		"ws": "0.8.0",
+		"ws": "^0.8.0",
 		"crc": "0.2.0",
 		"pomelo-loader": "0.0.6",
 		"pomelo-logger": "0.1.7",
diff --git a/sample/client.js b/sample/client.js
index 7ee37b2..2027fc6 100644
--- a/sample/client.js
+++ b/sample/client.js
@@ -50,6 +50,7 @@ client.start(function(err) {
       }
       console.log(resp);
     });
+    client.proxies.user.test.service.onlynotify(routeParam, msg[Math.round(Math.random()*(10-1))] + '::' + id++);
   }
 
   setInterval(func, period);
diff --git a/sample/config.json b/sample/config.json
index 435e17f..57c3445 100644
--- a/sample/config.json
+++ b/sample/config.json
@@ -1,5 +1,5 @@
 {
-    "protocol": "ws",
+    "protocol": "tcp",
     "host": "127.0.0.1",
     "port": "8080",
     "interval": 1000,
diff --git a/sample/remote/test/service.js b/sample/remote/test/service.js
index 0fd1f7a..d67fb8d 100644
--- a/sample/remote/test/service.js
+++ b/sample/remote/test/service.js
@@ -4,6 +4,9 @@ module.exports = function(context) {
   return {
     echo: function(msg, cb) {
       cb(null, 'echo: ' + msg);
+    },
+    onlynotify:function(msg,cb){
+      console.log('receive notify..:',cb,msg);
     }
   };
 };
\ No newline at end of file
diff --git a/sample/server.js b/sample/server.js
index 0a78fab..5cd58cc 100644
--- a/sample/server.js
+++ b/sample/server.js
@@ -9,7 +9,7 @@ var paths = [
 
 var port = config.port || 8080;
 
-var server = Server.create({paths: paths, port: port, acceptorName: acceptorName});
+var server = Server.create({paths: paths, port: port, acceptorName: acceptorName,reloadRemotes:true});
 server.start();
 console.log('rpc server started.');