CD not reading. Help I am running Win XP. My computer has two CD drives. One just reads the other reads and writes. I am finding that recenty some CD's just do not register at all. I insert them into the drive. The led flashes for about 20 seconds then nothing. If I go to My Computer it shows nothing in the drive at all. By way of example. Today I upgraded my Cell phone to a Nokia 6110 Navigator. The Nokia CD loaded perfectly but the maps CD from www.66.com just will not register with either drive. This has also happened with a few other CD's recently. Any ideas?