Session variable does not appear to set in PHP

I am having no luck getting a session variable to set in PHP. This can be viewed and tested at the starting page below. The session variable (User Email) should appear above the password text box. I tried creating a record set that filters off of the session variable, no luck in that route either. Is there something that I am missing in Session Variable requirements that prohibits this operation? 2 different ISPs are showing an identical problem with this operation.

History:
The create account page built in Security Assist was not checking for new users. To correct I created a plain version in Dreamweaver which then goes to assign an an SHA1 password with Data Assist and complete account creation.

The starting page in question: registration.php


<?php
if (!session_id()) session_start();
if (isset($_POST["Submit"])) {
$_SESSION["FM_User_Email"] = "".((isset($_POST["txt_Email"]))?$_POST["txt_Email"]:"") ."";
}
?>

Any help is appreciated, Gary Evans