when moving script to ec2 amazon script dont run

My local app loads and everything run fine, but once i put it on the ec2 amazon server and run node server.js and load the url - nothing happen, no even errors.

Here is what the script looks on both sides (local and amazon - ec2)

var express = require('express'),
    app = express(),
    server = require('http').createServer(app),
    io = require('socket.io').listen(server),
    port = process.env.PORT || 3000;

app.use(express.static(__dirname + '/public'));

io.sockets.on('connection', function(socket) {
  console.log('a user connected');
});

io.sockets.on('error', function (err) {
    console.log(err);
    console.log("Error: " + err.message);
});

server.listen(port);

help? suggestion? ideas?