Install the Asus Vista Cert, and/or CD Key manually. If it still dosen't activate, theres something wrong with the Slic table (Bios) If it does active, theres something wrong with your DVD setup.
I think it's my BIOS too, but I just got it modded on MDL a couple days ago, so I thought it would be legit. It even came with a matching cert. How can I check my BIOS to see if a slic 2.1 table has been inserted? I think I use the RW-Everything progam and there's a tutorial here on how to read it, I think. I'll look around some more. Thank you!