Have you tried installing the game on to the harddrive? Assuming your disk isn't damaged it should work since the games seems to be optimized for installation (ive been playing it installed, game loads fights alot faster when compared to running off the disk).
If you have already and it still does it, I'd assume it is a defective disk :/
Currently working on: Devil May Cry 4, Record of Agarest War,
Record of Agarest War: Zero, Bangai-O HD: Missle Fury
Proudest 100%'s: Hexic HD, Lost Odyssey, Final Fantasy XIII, Resonence of Fate
"MineCraft = low budget Skyrim."