I have my nintendo 3ds xl. After I bought it from my friend (with 2.1.0 for CFW), I tried to play DS game with 3ds since I don't have 3ds game card yet. However, it can recognize the game card, but can't play it! After I click the icon to play, it just shows black screen to me. This is my guess, but the same thing will happen when I put 3ds game card in it. My 3ds' version is 11.6 K, and I have B9S 1.3 as CFW. Please help me.