Hope someone can help. i've just downloaded GTA chinatown wars to my R4 card but when loading i get a save file cannot be read message and get asked to turn the DS off. i've downloaded numerous roms from the same website that have worked fine, however, GTA and Proffessor Leyton's (relatively new games) don't appear to work. Is there some sort of firmware that needs downloading to the R4 card in order to make them work?

Any help will be appreciated. Thanks.