Cannot connect to Active Directory

[JSUAlumni]

I know this is probably not a directly related Exchange problem, but I figure those of you who are experts in Exchange could tell me what's going wrong. I have a Windows 2000 Server (obviously), and I want to attempt to install Exchange 2000. The first thing I try to do is run /ForestPrep, but when I do I get the following two errors:
Cannot connect to Windows 2000 Active Directory
Schema master cannot be contacted for the forest

/DomainPrep gives the same error. So does just trying to install Exchange. I have the appropriate admin permissions: Admin, Domain admin, schema admin, and enterprise admin. I know Active Directory is up and running. We only have one server cause it's a very small office. So, it's the domain controller and email server. I've tested and used Active Directory Users and Computers, etc. so I know it's working. Any ideas?

 

[Xybertron]

Install support tools.
Run netdom query fsmo

Does DNS point to the local box and forwarders in DNS point to ISP?

Dan
Microsoft Exchange Support @ Microsoft

 

[JSUAlumni]

Thanks, for the help. We've actually already had to call and get some support. Our DNS configuration was toast. I ran DCDIAG and a whole bunch of stuff wasn't jiving so I figured it was time to call someone.