Still stuck on Sessions :-(

Hi there everyone, Thanks to everyone that replied to my session help - but i'm still having problems. I use the below to open a session - Say at the start of my website: <?php session_start(); session_register("user"); $user="$username"; session_register("pass"); $pass="$password"; ?> where username and pass would be defined by a variable - either from a form or hardcoded. Now, if I use <?=("$user")?> on the SAME page as this is, it displays the varibles, but if I move to another page on the website via a link the session seems to have ended or something as it says $user is undefined. Do I need to add anything to each page where a session is needed so that it grabs the variables before I can use them? Or am I doing something totally stupid? I've tried it on my Win2000 system AND on my Linux server. Please help, I am getting totally frustrated and need to get all this working within 2 weeks :-( Thank you Regards Chris Payne www.planetoxygene.com