I recently bought a r4i3d.com card that has written "r4i3d F 2013", my ds does recognize it(as a spongebob game), the problem is that it goes directly to a white screen when I select it, so i'm assuming the problem is the missing firmware,it could be also a faulty sd card,I tested on another ds and it does the same thing, I don't think the problem is my ds since I have a original game that works just fine