howtodo this with vbulletin

[Delphiprogrammi]

hi people,

i have a custom usergroup called "permmaned_banned" with id 9.Now when i add a user to it (just a test username) and i goto "view banned users" vbulletin tells me "no users are banned on $vbulletin->options['bbtitle']"

i know vbulletin stores custom usergroups in a filed called "membergroupids" in the user table and i think no i know for sure i can get this with the MySQL function FIND_IN_SET().But since this function is not used verry much and not verry well documented i ask here

PHP Code:

$querygroups = array(); 
    foreach ($vbulletin->usergroupcache AS $usergroupid => $usergroup) 
    { 
        if ($usergroup['genericoptions'] & $vbulletin->bf_ugp_genericoptions['isbannedgroup']) 
        { 
            $querygroups["$usergroupid"] = $usergroup['title']; 
        } 
    } 
    if (empty($querygroups)) 
    { 
        print_stop_message('no_groups_defined_as_banned'); 
    } 
    //################################################### 
    // now query users from the specified groups 
    //################################################### 
    $getusers = $db->query_read(" 
        SELECT user.userid, user.username, user.usergroupid AS busergroupid, 
        userban.usergroupid AS ousergroupid, userban.reason AS reason, 
        IF(userban.displaygroupid = 0, userban.usergroupid, userban.displaygroupid) AS odisplaygroupid, 
        bandate, liftdate, 
        adminuser.userid AS adminid, adminuser.username AS adminname 
        FROM " . TABLE_PREFIX . "user AS user 
        LEFT JOIN " . TABLE_PREFIX . "userban AS userban ON(userban.userid = user.userid) 
        LEFT JOIN " . TABLE_PREFIX . "user AS adminuser ON(adminuser.userid = userban.adminid) 
        WHERE user.usergroupid IN(" . implode(',', array_keys($querygroups)) . ")  
        ORDER BY userban.bandate DESC, user.username 
    "); 


what would be the SQL to run to include the customgroups ? i have no idea howto use FIND_IN_SET() and that function could solve the issue