Two domain controlers windows 2003 on Same network

I have a domain controller on Windows 2003 environment.
We decided to add another DC on the same network.
Although we followed the correct instruction, the new DC cannot act as DNS correctly.

"replmon" shows that everything is ok but, using "netdiag" fails on " Domain membership test
machine is not working properly as DC".

Any suggestions?
DyktioAsked:
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joelsplaceCommented:
Neither one is SBS right?
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DyktioAuthor Commented:
Not SBS on the network
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Brian PiercePhotographerCommented:
have you configured all the clients so that one server is their preferred DNS server and the other is the Alternate DNS server (in the TCP/IP settings for static IPs and in the DNS Options for DHCP clients?)
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DyktioAuthor Commented:
For all clients we have the same preferred DNS as first and the other as alternate.
NO DHCP server on the network.

As for the two DCs each one has only there own IP address as preferred DNS. No alternative for them.
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joelsplaceCommented:
Does netdiag show any other errors?  I would unjoin and rejoin the newest DC as a member server, make sure everything works properly before promoting it to a DC.
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DyktioAuthor Commented:
Should I DCdemote?
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joelsplaceCommented:
Yes using dcpromo and then unjoin it from the domain, rejoin check that everything seems good before making it a DC again.
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joelsplaceCommented:
Make sure you tell dcpromo that it isn't the last DC in the domain if it asks.
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DyktioAuthor Commented:
This is an application server (SQL).
If i disjoined it from the domain, would this affect any of the applications on this server?
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joelsplaceCommented:
I'm not an SQL guy and I can't recall if I've ever done it on a server with SQL running.  Sorry.
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Windows Server 2003

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