How come game codes for action replay dsont work?

my action replay doesn't work when i put in the game code for disgaea ds. when i put in the code for the game it wont let me play the game it freezes up. can someone tell me wat to do? i also need the game id and code for this game.How come game codes for action replay dsont work?The Disgaea Ds action replay game id is: CDGE-579752F0



And heres where to go for some codes/cheats: http://wiki.dscoders.com/index.php/Disgaea_DS