gran turismo 5! help !!!!!

does any one know how to get gran turismo 5 to work on 3.55 cfw, because all of my other games work fine apart from that, it takes me to a blank screen when i go to load it. what do i need to do to get it to work help please? i am on watanza 3.55 cfw thank you.???????????????

You need to backup an original copy off of the disk. If you have any modified files, the game will black screen. BTW: this is covered so many times in this forum, it's not funny. Thread closed. Please search.