Have you tried phoning to activate?
as Mattey1 said..
http://www.mydigitallife.info/2008/...r-on-windows-vista-or-server-2003-activation/
give that a try (everything they say in there)
Hmm, sounds a bit dodgy. Legal version?
Judging by Mattey1's link, it sounds like you're you trying to install a corporate version on a home PC? It might be looking for a Key Management Server on a corporate network using DNS.