Only PIO!?

OK, I really need some help here.  I just installed 2K on my computer, and now I'm only running in PIO mode on my HD.  I know(or atleast thought) I was running in ATA100 when I had 98 installed, and my bios shows that I'm going in ATA100.  So whats causing 2K to only run in PIO?!

I really need to fix this because I do alot of video capturing and editing, and I need a very fast HD, PIO just wont cut it...