I just installed a GSA-H42N (and a GSA-22N) and have the same problem with both: Windows recognises the drives but the drives will only read DVD's. Cd-Roms and music CDs are ignored.
I had thought the problem might be that I was using a DMA40 cable and needed a DMA80. Well, I was wrong. New cable, old problem.
Being somewhat clueless about troubleshooting - previous drives were simply plugged in and worked - is there an obvious solution to this problem or should I just give up in despair?