I tried to play gba roms both on my 3ds and ndsl, but both failed. I download the GBA emulator, unzip it and then copy the two files "NDSGBA" and "_dstwoplug" onto root of the TF card. THen I copy some gba roms to the tf card. After I inserted the dstwo plus flashcart into my NDSL/3DS, I clicked the flashcard icon and then it showed "NO FIND SYSTEM FILES". So what's the reason ?