How do I configure DCs on TSs with Presesntation Server 4.5?

This is a repost of a question I posed to the domain controller zone but I have confirmed the setting are correct on my DC and they are replicating normally.  Therefore I think my issue may be a Citrix/Presentation Server 4.5 configuration problem.

I have a Server 2003 R2 network with two Server 2003 R2 domain controllers and three Server 2003 R2 terminal servers running Presentation Server 4.5.  When my first DC is down my TS server users get logged out of Citrix and cannot get back in until the primary DC comes back up.

I have confirmed that all three terminal servers have both the primary and secondary domain controllers listed in DNS and the DCs, themselves are communicating.  When I make a change in AD one one it is replicaticated to the Active Directory in the secong domain controller.  

How do I my Citrix environment to default to the second domain controller in the absence of the first?
nhawkinsVAAsked:
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AnthonyHamonConnect With a Mentor Commented:
Please confirm that there are SVC records for the second DC in DNS.
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nhawkinsVAAuthor Commented:
The SVC records seem to match all the way across the board but I did find a number of 9999 error messages (see sttached) in DNS.

 DNS-issue.docx
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nhawkinsVAAuthor Commented:
Thanks
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