php session not working, tried all sorts

[MMSU]

I've been stuck on a problem for the past 3 hours and its driving me mental in regards to PHP sessions. Iv moved on from session_is_registered to $_SESSION and it dont want to work.See code below (is in all files right at very top on pages i ant to protect with login):\[code\] <?php session_start(); if(!isset($_SESSION['user'])) header("location: login.php"); ?>\[/code\]On another page access.php I have a form with two input boxes and submit button to check input and cross reference it with db. When incorrect values are entered i get message "Invalid login" which is right.. But when i type correct details leads me back to login.php page asking to login.I am saving session and checking details as follows:\[code\] <?php session_start(); include("dbfile.php"); $sql = mysql_query("SELECT id FROM myTable WHERE user=$username AND pass=$pass"); if(mysql_num_rows($sql)==1){ $_SESSION['user'] = "Test"; header("location: account.php"); }else{ header("location: login.php"); } ?>\[/code\]unfortunately i am on a shared server which has register_globals off but am not sure if that is the problem. if i echo the output of the session o nother pages i get nothing. Like its not even registering/ssaving the session.I have cookies/js enabled on browsers. Infact, i have tested on 4 browsers but same result. Whos gonna be the life saver on this one..