Try clearing the console cache, and see if that helps.....
Clear All Installed Game Updates and Console Cache- Go to the "system" blade
- Select "memory"
- Press Y on the HD symbol
- Press X,X, Left Bumper, Right Bumper, X,X
- A message will appear saying: "Do you want to perform
maintenance on your Xbox 360 storage devices?"
- Select Yes
If not, try installing the game to the HDD.