I don't know a lot about computer, so excuse me if the question is out of place. But I recently purchased Parallel 4.0 for my Mac OS X 10.4.11. I installed it the proper way, I think. But when it comes to installing my Windows XP cd disk, I get a "setup could not read the cd you inserted." What should I do? I have an authentic windows xp cd already in, yet the parallel setup is telling me otherwise. Please help!