How to run nodejs with apache for ubuntu 12.04

Hello, I’m trying to run an application in php with chat in nodejs and socket io I follow this exemple https://github.com/hmagdy/ChatNodejsZendSocketio My application has the same architecture and it works well in localhost, but i have some problem to deploy my application in the server. I’ve tried this solution http://garr.me/blog/running-node-js-and-apache-together-using-mod_proxy/ But I got a “503 Service Temporarily Unavailable” error,

My virtual host config is

<VirtualHost *:80>
    ServerAdmin admin@site.com
    ServerName test.site.com
    ServerAlias www.site.com 

    ProxyRequests off

    <Proxy *>
        Order deny,allow
        Allow from all
    </Proxy>

    <Location />
        ProxyPass http://test.site.com:8080/
        ProxyPassReverse http://test.site.com:8080/
    </Location>
</VirtualHost>

My client.js

$(document).ready(function() {
socket = io.connect('http://test.site.com:8080');
blabla

And server.js

var app = require('express').createServer()
var io = require('socket.io').listen(app);
app.listen(8080);
blabla ...

Can you please help me to figureout what i’m doing wrong. Thank you.