Ok. I have DS Lite, M3 DS Real + Rumble Pack. I remember it was working great not long time ago. I don't know what happen now but when I tried to make it run I see black screen with M3 logo and that's it! I formated my Micro SD card (tried FAT and FAT32) and put Software from M3 site (System folder). I sent a letter to M3 and here is what they sent me: This may be an issue with the contact please try these methods and see if that will solve the issue. "Dismantled the m3 real and stick a piece of paper right between the case and the part where the contacts are" or ""slip a piece of paper in the ds before inserting the M3. Lo and behold - it worked. Turned it off, slipped out the paper, and it should still works." If you have any further questions please email us again. But still I don't understend that! What paper! How big! Where! Maybe some pictures!