DUDE! I have the same problem.....seems to be mostly from Sony (Columbia Tristar) and also happened with Constantine which is Warner Bros. I think it must be some sort of copy protection at play here. A friend said it might be detecting burning software on the computer and as a result makes the disk completely undetectable to the computer. I tried uninstalling all software, but with no luck. I will keep on trying to figure out a way around this, I'll post if I find out anything.