this question is one that i've seen multiple variations of and here's yet another, when i start my fat old ds it boots up normally and the menu pops up with the acekard showing in the slot 1 spot, when i press on the acekard icon it shows loading for a split second then it says system file is missing. i've tried downloading different versions of the firmware for the acekard 2i but nothing seems to work. btw this is a 4 gig card that used to work but then i played a japanese version of pokemon white before the us release and i think there may have been a bug somewhere in it. and on another completely unrelated topic my acekard will burn through sd cards like candy for whatever reason it would work for about 2 months then it would quit but the cards will still work in things like cell phones and computers. Any information on either one of those problems would be a great help! Thanks!