[Silent314]

There cannot be spaces in field names as said above.

The proper syntax would be:

PHP код:

mysql_query('UPDATE `users` SET AdminLevel = "1" WHERE Username = "'.$user.'"'); 


And then the check would be:

Код:

$query4 = mysql_query('UPDATE `users` SET AdminLevel = "1" WHERE Username = "'.$user.'"');
if(!$query4)
{
  echo mysql_error();
}

or

Код:

if($query4 == 0)
{
  code
}