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Active Directive will not install even after ADPREP

Network currenly consists of One Windows 2000 Server that is the Root Domain Controller. This is old and starting to fail. Another Windows 2000 Server that is another Domain Controller. One Windows 2003 MEMBER server with SQL 2000 on it. I have a NEW Windows 2003 R2 SP2 server that I need to install active directory and make the root DC. I ran adprep /forestprep on the root DC. There were no errors listed. I let it sit overnight. I ran adprer /domainprep on the Root DC then let it sit for about a 1/2 hour. I then tried to install active Directory on the NEW server. I get the following message:
"The active directory installation wizard cannot continue because the forest is not prepared for installing Windows Server 2003. Use the adprep command-line tool to propare both the Forest and the domain. For more information about using adprep - see Active Directory help.

"The Version of the Active Directory Schema of the Sorce forest is not compatible with the version of Active Directory on this computer".

I have shut down the network and restarted. Since the ROOT DC was having problems, I moved the FISMO roles to the second Windows 2000 DC, Turned off the original root DC. I am able to access the network from all workstations with out a problem. I then re-tried the Active Directory installation. I get the same error.
Does any one have any ideas????
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Dubbi47
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Dubbi47
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JascotCommented:
With Server 2003 R2 there is a newer ADPREP on the Disc 2 CD. Is that the version of ADPREP that you ran? If not, try that one as it is a newer schema version than Server 2000 or the original Server 2003.
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JascotCommented:
I just reread your message. If the first Windows 2000 server is still a domain controller, it may need to be running or else completely deleted from AD before you can DCPROMO the new server. If it works at all, you may want to fire it up before you try the ADPREP and DCPROMO.
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Dubbi47Author Commented:
Thank you. I used the one on disc 1 per the documentation on Microsoft Knowledge Base.  I had seen several posting about failures when running this version. Maybe running the original version before this one helps... no telling... Anyway, It has installed and I will move the FISMO roles over after the network has a chance to replicate. Thank you again. I put in a call to Microsoft and never receive the TWO hour call back.
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JascotCommented:
Glad I was able to help. That exact problem hit me the first time I tried to add a 2003 R2 server as an additional domain controller to an existing network. :}
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