集成node.js、socket.io和php网页

我将把我的php网页与node.js和socket.io集成在一起。客户端可以连接到node.js服务器文件，但socket.emit函数无法从客户端到服务器或返回。这是我的nodeClient.js文件：

var socket = io.connect( 'http://192.168.0.10:8080/index3.php' );
$( "#messageForm" ).submit( function() {
    var nameVal = $( "#nameInput" ).val();
    var msg = $( "#messageInput" ).val();
socket.emit( 'message', { name: nameVal, message: msg });
// Ajax call for saving datas
$.ajax({
    url: "./ajax/insertNewMessage.php",
    type: "POST",
    data: { name: nameVal, message: msg },
    success: function(data) {
    }
});
return false;
});
socket.on( 'new message', function( data ) {
    var actualContent = $( "#messages" ).html();
    var newMsgContent = '<li> <strong>' + data.name + '</strong> : ' + data.message + '</li>';
    var content = newMsgContent + actualContent;
    $( "#messages" ).append(newMsgContent);
});

这是nodeServer.js文件：

var socket = require( 'socket.io' );
var express = require( 'express' );
var http = require( 'http' );
var app = express();
var server = http.createServer( app );
var io = socket.listen( server );
io.sockets.on( 'connection', function( client ) {
console.log( "New client !");
client.on( 'message', function( data ) {
    console.log( 'Message received ' + data.name + ":" + data.message );
    //client.broadcast.emit( 'message', { name: data.name, message: data.message } );
    io.sockets.emit( 'new message', { name: data.name, message: data.message } );
});
});
server.listen( 8080, function(){
  console.log('listening on *:8080');
});

ajax将数据存储在mysql中。每个连接的客户端都被识别为"新客户端！"。但客户端和服务器之间没有消息通信。我的代码可能有什么问题。