Windows 2000 Domain

Hi,

I have recently configured a Win2000 workgroup to a domain with active directory but I am unable to join any clients to the domain. I have a W98 and W2000 pro client both say they are unable find domain or that it does not exist. I have static IP addresses on both clients and can ping all 3 servers in domain and servers can see clients.

hope someone can suggest where to look for resolution.

Thanks
J