Hello Cheryl,
In a Windows NT domain, clients use either a WINS Server or broadcast based
name resolution
to be able to find the domain controller for the domain to authenticate when
trying to log on to a domain.
So I would check if the 1C and 1B record exist on your WINS Server or not.
If they do not, then make sure that all your domain controllers are pointing
to the correct WINS Server
and run the following command "nbtstat -RR" to force registration.

Signature
Regards,
Mohanchand Koduri [MSFT]
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> Hi,
>
[quoted text clipped - 7 lines]
>
> Cheryl