[jlalt]

You're executing a threaded query first _tquery then executing a non threaded one, _query.

either change both to non-threaded or threaded.

PHP код:

mysql_format(Database, DB_Query, sizeof(DB_Query), "UPDATE `RANKS` SET `D%dR%d`='Undefined' WHERE `ID`='%d'", i+1,j,listitem+1); 
mysql_tquery(Database, DB_Query);