I have an imac DVSE. I recently bought a DVD on ebay and it made my imac freeze when I tried to run it. I returned it and she sent it back to me and said it worked fine on her home DVD player. Is there any setting adjustment I can make to allow this DVD to play on my imac or am I out of luck? (It won't load. It freezes the computer if you try to exit out of the DVD player.)