So i bought this card from a friend and it works well but he must have not used it on a 3ds because it will not work. I have tried updating it i have the most recent wood 1.64 and i have the 6.2.0-12 3ds but it will not let me update it. When i try to run the patch file on my DSL it fails the card check. i did a lot of research and i cannot find any helpful information because it seems no one else has had this problem.