I'm having some problems with our Group Policy Objects on our DC. I'm trying to set domain level security policies, but when I try to get into DC Security Policy I get the error "failed to open Group Policy Object". Did some googling, and an article directed me to gpotool.exe. I ran it, and here's what I got:

C:\Program Files\Resource Kit>gpotool /verbose
Domain: HIFS
Validating DCs...
HPSERV.HIFS: down (sysvol only)
domcon.HIFS: down (sysvol only)
bakserv2.HIFS: down (sysvol only)
Error: DC list is empty
All three of those are indeed DCs.

So, I don't know much about this, beyond that sysvol being down is a really bad thing. Can you guys shed some light on this, and how I go about fixing it?