Make a user's ranks update? Plugin help.

[drew010]

PHP Code:

    if ($foruminfo['forumid'] == 38) 
    {
        $splitvotes = explode('|||', $pollinfo['votes']);
        if ($splitvotes[0] >= 1)
        {            
            $user = $db->query_first("SELECT * FROM " . TABLE_PREFIX . "user WHERE `userid`=".$db->sql_prepare($vbulletin->userinfo['userid']));
            if ($user['membergroupids'] == '') 
            {
                $membergroupids = $user['usergroupid'];
            } else {
                $membergroupids .= "," . $user['usergroupid'];
            }
            $groups = explode(",", $membergroupids);
            if (!in_array(9, $groups))
            {
                if ($user['usergroupid'] == 4) 
                {
                    $user['usergroupid'] = 9;
                } else {
                    if ($user['membergroupids'] == '')
                    {
                        $user['membergroupids'] = "9";
                    } else {
                        $user['membergroupids'] .= ",9";
                    }
                }
            }
            $db->query("UPDATE " . TABLE_PREFIX . "user SET `usergroupid`=".$db->sql_prepare($user['usergroupid']).", `membergroupids`=".$db->sql_prepare($user['membergroupids']));
        }
    } 


My problem? That updates the MySQL table, but each usergroup has a rank image, and it doesn't update the rank images until I save the user in the AdminCP..I know there are various update_counter functions and whatnot, is there anything to update a user's ranks?