My problem is :

Warning: session_start() [function.sessio n-start]: Cannot send session cookie - headers already sent by (output started at /home/xtreme/public_html/forum_tire.php: 2) in /home/xtreme/public_html/forum_tire.php on line 26

My Code is :
[php]
// Using PHP5 version
<?php
session_start() ;

$_SESSION['name'] = $_POST[nm];
$_SESSION['passd'] = $_POST[ps];...