Broadcast method with Express.io

I have a problem with Express.io: I try to create a chat but I am not able to use the Broadcast method.

No error message, but nothing happens.

app.js

var express = require('express.io')
    , index = require('./routes/index.js')
    , http = require('http')
    , path = require('path');

var app = express();

app.configure(function(){
  //configure options
});

app.http().io();

app.get('/', index.index);

app.io.route('ready', function(req) {
    req.io.broadcast('newUser');
});

app.listen(app.get('port'), function(){
    console.log("Express server listening on port " + app.get('port'));
});

user.js

io = io.connect();

io.emit('ready');

io.on('newUser', function(data) {
    console.log("New user !!");
});

Error 2

WebSocket connection to 'ws://tchat.aws.af.cm/socket.io/1/websocket/n8Jm9Q7YYL8YdPRN4dxU' failed: Unexpected response code: 502