Active Directory Install Problem

I have set up a Win2k service and want to install Active Directory for a test domain. When I go to run the wizard it quits and prompts me with the error message: “The operation failed with the following error: The network location cannot be reached…” I have installed DNS and DHCP. There are no other systems involved. The NIC is installed, DNS is setup, and DHCP is active. Any ideas what I’m forgetting.