so when i first stuck my sd card into the card reader and stuck it in the computer, it was fine. i put it the firmware and a couple of games, which were in a separate folder. and i stuck the sd card into the dstt in my ds. the games started but froze. i shut it down and tried the other game and if failed to start. i put the sd card back into my computer but this time nothing popped up. i checked my computer and clicked removeable hardrive but it said i had to format it. i tried to but then it said failed to format and windows cannot format. i've heard that the problem might be from the card reader rather than the card, which is 2 gb. in dire need of help. thanks a lot.