Template variable freezes after user logout (?)

[Slanger]

Hi guys,
so I recently added this code to "includes/functions.php":

Code: Select all

if ( !function_exists('group_memberships') )
{
 include($phpbb_root_path . 'includes/functions_user.'.$phpEx);
 }
$groups = group_memberships(false,$user->data['user_id']);
foreach ($groups as $grouprec)
{
$template->assign_vars(array(
'S_GROUP_' . $grouprec['group_id'] => true
 ));
 } 

In order use that line in "overall_header.html":

Code: Select all

<!-- IF not S_GROUP_11 -->ad code here<!-- ENDIF -->

To find out whether the user is in this group or not through my template page.

Everything works well, until I logout and relogging again and I do not see any sign of the code above.
I have already tried to clean cache both in the forum and in my own browser and refresh the templates as well, still doesn't work.

Anyone?
Thanks.