Gateway optiarc dvd

I have a Gateway T-1628 with an Optiarc DVD RW AD-7563A ATA Device. It plays Cd’s, burned Cd’s, just not DVD’s or DVD rom. Really want to figure this out cas I just got Sims 3 and it does not see it.
I’ve looked around and found 2 fixes, however I looked in regedit and there is no upper or lower filter listed in the suggested spot. Nor do I have a secondary IDE channel.
This seems to be a fairly common problem and Gateway is only telling me my warranty has expired, DUH!
Please help!:bow: