Hi Chrissy, Jack and Janet,

My client finally got back to me - I think I see the problem, but I would like the 'official' answer to the problem.

Their peer to peer network is comprised of the following systems (please make sure you are sitting down)

User 1: Windows Vista Home Premium (this is the one with trouble logging in).

User 2: Windows Vista Home Premium (server)

User 3: Windows XP Home Service Pack 2.

User 4: Windows XP Professional NO service packs.