Asus DVD writer is recognized, but won't play DVD's or CD's

[mario escoto]

FIrst of all, I can't boot from the DVD drive for any Ubuntu installation CD, WIndows works fine. I am presently running Ubuntu 11.10 alongside windows 7. I installed Ubuntu 11.04 with wubi and then upgraded to 11.10. I had the same problem with my DVD drive in 11.04, so I am wondering if there is a compatibility issue with Asus hardware. I just bought this drive about 2 months ago to replace an old one. As I said before everything works fine with windows. It's just Ubuntu I can't get it to work. Any help would be greatly appreciated. Thank you.