Hi Brian
Thanks for your reply (and also for your comment on another thread about this being a holiday weekend in the US).
I already have
<?php
if (!isset($_SESSION)) {
session_start();
}
?>
at the top of my login page.
I was a bit confused as to which page you were saying I should add it to, so have tried adding to the index page also.
I have also tried
<?php
session_start();
?>
in various combinations on both the login and index pages.
Does this help?