Lost session variables still confounding me

I think I've tried just about everything that I found googling. Still no luck. I'm throwing this out again, with the chance that something missed before maybe noticed. Page 1: //Start the Session - begin Block @session_start(); <form method="POST" name="form1" action="Page2.php"> <input name="ListingName" type="text" id="ListingName" /> Page 2: //Start the Session - begin Block @session_start(); //Set the session variable, input on Page 1 $_SESSION['f1a'] = $_POST['ListingName']; Page 3: //ON this page, I check that f1a still exist using an echo - generally it does unless : //Start the Session - begin Block @session_start(); if (count($myarray) > 5) { $_SESSION['arrayerr'] = "you have selected too many industries"; header ("Location: Page2.php"); exit; } If the validation above passes, no problem. But if it doesn't, once it redirects, the session variable , f1a is bye bye. I've tried passing the session_id, session_name, i've printed out both to make sure they remain the same. I' ve done relative and absolute paths. Searching for this problem , it seems I'm not the only one who has suffered with this issue. Some was prior php 4.3 when session_write_close was needed. I've thrown that in as well. I just don't get it. Stuart