Please Help!

Recently I upgraded a PDC to Active Directory. Now several of my co-workers can access Active Directory Users and Computers from their machines, but when I try to open it I get this error message:

Naming Information cannot be located because:
The specified domain does not exist or could not be contacted.
Contact your system administrator to verify your domain is properly configured and is currently online.

If I answer ok to this error Users and Computers will open. If I then right click on the Active Directory Users And computers in the MMC and connect to the DC I can view the contents. I can remove users from groups, but when I try to add a user to a group I get this error:

Object Picker cannot open becuase no location from which to choose objects could be found.

I have been through tech net, and did not find anything helpful.

Has anyone ever seen this?


Thanks,
Slim

How did you install it? Did you install from the adminpak.msi package or some other way. If you haven't already, maybe you should just install/reinstall from this package, which loads the admin tools that would be found on a Win2k server. This, of course, includes AD users and computers.