Session troubles

[nat]

We are trying to set up a menu with a sub menu, that changes for different levels of access.
We can log users in they can user other forms with access level restrictions.
But when we try to determine what user level they are to show relevant menus, it falls over with varying errors.
Any suggestions would be great.

---

if($login == 'admin')
{

do_html_header("Successful Login");
$valid_user = $login;
session_register('valid_user');
$session_alevel = "3";
session_register('session_alevel');
echo $session_alevel;
}
else if($login == 'normal')
{
do_html_header("Successful Login");
$valid_user = $login;
session_register('valid_user');
$session_alevel = "2";
session_register('session_alevel');

}

if($session_alevel' == '3')
{
$alevel=3;
}
else if($session_alevel' == '2')
{
$alevel=2;
}

[Weedpacket]

Try using session_register('valid_user') before setting $valid_user. Otherwise, any sessioned values of $valid_user will overwrite the new one.

Better, forget about session_register() completely, and just refer to your session variables as $_SESSION['valid_user'].

And what are the "varying errors" you mention?