nds4droid help please

I've been using the nds4droid emulator on my HTC evo 3D and everything is fine with the emulator, speed is fine, only problem I'm having is with putting in cheats in the cheat section of the emulator, I start the game and go to cheats and when I add the Game ID(master code) for the game it doesn't show, for example if I put the game ID for pokemon white which is IRAO-0F0875FE it doesn't show, I know I'm putting the right code and I check that it is the right code, does anyone know what I could do? Thank you