I don't know what I did wrong. I watched a video on how to set up the M3i Zero before attempting to set it up. I put the system folder and the f. core into my SanDisk 4gb Micro SD card. Then I flashed the card with the USB flasher. The LED light blinked red for around 30 seconds and then it stopped. Then I inserted the M3i Zero card into my DS, and the DS didn't recognize it. I flashed the card one more time and it still didn't work. I kept turning my DS on/off and ejected/inserted the card a couple times. It still wouldn't work. Is my card fake or is it defective? I bought it from DealXtreme; I consider the site legit because I have purchased a AceKard2i from there before and it worked normally.