I have downloaded the emulator No$GBA. I have downloaded a couple of DS roms coz i use a different emulator for gba. I click on it and it tells me to choose a rom and i do. It is in the No$gba folder but it loads and then it says " Cannot Read Data, Please turn off power and reinsert game card." I have downloaded the same emulator again but it does the exact same thing. Either I have to change something or im a total idiot, Please Help.