Windows 2000 Advanced Server AD

Hello,

My question is I am running Active Directory on my server and everytime I attempt to connect to it to join the domain,it says (After it asks for my user name and password) “The following error has occured when trying to join the domain “Primary” The network patch cannot be found”

How do I fix this? I see everything in the Network Neighborhood, I see the Domain and the PC. The Server is setup as a Domain Controller using Active Directory.

Please help.
Thanks