I downgraded my 2ds (from 11.1 without softbricking) and I succesfully installed luma3ds and A9LH using https://3ds.guide in order to use my DSTWO+ card to emulate 3ds games. However, when I put the card in the slot, it gives me the message 'an error has occurred. Hold down the power button ....etc'. Before I downgraded, the card did work ( I tried an ds game, worked ). Can someone help? It doesn't take normal games anymore either.