ok, maybe a difference between are versions eg. Uk and US and codes, if not, could just be the card/codes/game ver. eg. V.1 and V.1.1, prime example is Harvest Moon DS V.1 and V.1.1, fortunately the codes were only different by hex value 4 for each line. My advice is check all these and browse around for codes. There is a site i would direct you to,but it closed down they were really, really good at making codes and answering questions such as yours, but if it was too stupid of a question, you could get banned, due to it either already being there somewhere, or too unclear for even you to realise what youmeant afterwards... I miss that site