Forza Freezing

I have a Halo Edition Xbox (Don't know if you need that or not) With a 200GB HD and XBMC 360 as my dash. I just bought a legit copy of Forza Motorsport and on the disc it also says Xbox Live Arcade Included. Everytime I load the game, the Xbox Live arcade works but it freezes when loading Forza. I tried another disc, still the same problem. I tried loading the disc via the original Xbox dash, same problem. How can I fix this and is there a copy of Forza that doesn't include the Xbox Live Arcade? I believe I have a Samsung Drive in mine that reads all the other games fine. I tried a rip to the HD of the game and it completed successfully with no read errors, no renamed files.

Also my drive only reads DVD+/- RW, not +/- R's, Why? I thought the Samsungs were supposed to read everything.