Sorry...I wasnt thinking straight
A database error suggests one of two things:
a.) You have removed a hack, which affects the database and admin/user.php...You may have forgotten to remove the part of code in the admin2/user.php, and therefore it is trying to search the database for a field that doesnt exist...
b.) You have installed a new hack that affects admin/user.php, and havent made the changes to admin2/user.php...
Satan