help in getting games work in Wood R4i

I just downloaded Wood R4i and used a 2gb kingston memory card last week and all the games i've put worked like charm... but when i changed my memory card to 8gb kingston mc, some games like bokujou monogatari:futago no muura, tokimeki memorial girls side 3rd story and hakuouki just keep having a white screen... any suggestion? btw, other games worked fine...

theres only wood r4, not wood r4i and just reformat your card and it should work thats what my friend did and his works fine now