problem in superadministrator
 

hello everyone

I've serious problem in my board
when I'm trying to remove user form super administrator group by setting it's usergroup in admincp to registered users and removing him from administrator usergroup ,he was removed successfully.
but now he return again as superadmin and i don't know HOW!!!!
i tried to edit config.php and confignew.php and search for his id in [special users] but i didn't find it
the last possible solution that he edit himself in database in server
mmm.,,i don't know how can i remove it's permission from database..can anyone give me a solution for how to do so???

Thankss alot in advance :)