Got my DStwo yesterday, and spend about 10 hours so far trying to solve this problem including half that time with google searches. Maybe someone can help? I have a DSI XL and a recently purchased 3DS XL (the one that came with Mario Kart from Best Buy). My 3DS XL is version 4.5, but I understood that the DSTwo was already updated to work, so I was hopeful. I downloaded the firmware v1.1.9 and Dstwo v1.11_20120_1030 files, put them on the root as instructed, and popped the card into my DSi XL - it updated smoothly, and ran immediately off that system. I then popped it into my 3DS Xl, and no icon. I popped it in and out a few times, and the icon finally showed., but after launching I got the standard error screen with the power down warning. I powered back up but now the icon wasn't there again. I was thinking, OK, it's not making contact perhaps. So, I cut a piece of very think plastic out, slid it in with the cartridge, and now the icon showed first try. I reset the machine to start from scratch and the icon remained intact -- a good sign. Start it up, and now I'm getting blank screens: White on bottom, black on upper. I tried two different sd cards, 16GB and 4GB, same problems. I formatted with the Panasonic formatter, same problems. Any ideas at all? I used DHL to get this guy here quick. I didn't want to use this exclusively on my DSI XL, I already have an Acekard 2i for that one (I only wish those guys would have updated that card). Thanks in advance!