FM4

I had never really got into the FM series. but I have had them and never really actually played them. I decided to hop on FM4 and actually try to beat it as I don’t have the one and can’t afford it. Well I got on and none of the discs I have actually work. Don’t know why because I have never played them. I can’t really afford anything at the moment is there a way I can get it quite cheap swap with someone? I have tried resurfacing both discs but it did not work. Thanks guys!