Active Directory authentication

Active Directory authentication

I have a new install, it's the current release.  I'm trying to activate AD authentication and get the following error when I do:
 
FAILURE :Could not enable Active Directory Authentication. Ensure Domain Controller is configured for atleast one of the Public Domains.
 
Everything looks ok that I can think of, can you give me more info about this error?  It's Server 2008, current updates, 32bit on Hyper-V virtual hardware drivers.
 
Jim Tall,
John's Island Club
 

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