Hi there, i bought a new m3 simply, the seller tested it on his ds in front of me, so it works, is new. But when i arrived at home, filled a new micro SD card with games and the new firmware and all, but when i put it on the m3 and then on the DS the system just goes to the Calendar and Clock display and says that there is no DS cart inserted on the system. As if where no game. The seller says that maybe my DS is flashed [i am the second owner, and didnt knew about the flash thing] is it true? It can be unflashed? the seller says that he can restore the firmware or unflashit. By the way, when i make the trick to see my firmware on the DS, it appears with a purple/violet color on both screens, is it good or bad? thanks a lot.