Websocket：无法与基本websocket服务器建立连接

Question

I've tried very basic websocket tutorial using ratchet php, exactly as shown in http://socketo.me/docs/hello-world

Code for websocket server:

<?php
error_reporting(E_ALL);
ini_set('display_errors', '1');

require 'vendor/autoload.php';
require 'chat.php';

use Ratchet\Server\IoServer;
use HHWS\Chat;


$server = IoServer::factory(
    new Chat(),
    8080
);

$server->run();

To run the server I did:

$ php ws-server.php

And to test the connection with the server I did:

telnet 127.0.0.1 8080

This worked perfectly fine when tested LOCALLY. Users can chat using multiple telnet terminals.

I then uploaded the code to live server. And the tried running the server. Then tried to connect to this server using telnet just like before, it couldn't connect. All it shows is "Trying.." message and then " Unable to connect to remote host: Connection timed out".

I don't know why this is happening, and what the problem is. The code is exactly the same. And this is very basic hello world example I'm doing. Can anyone help me on this. Do using "Websockets" have any other requirements on the live server to work.

Update: Actually, the live server is Amazon EC2; does this require setting up additional things for websocket to work?