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DNS replication issues on W2K8 R2 Dc child domain

Hope you can help,
We have an AD domain with the root domain being abc.local, we have added multiple child domains over the years with no issues, we have say us.abc.local, ca.abc.local etc.
I wanted to create a new child domain us.abc.local the server is W2K8 R2, the first DC in the abc.local domain is W2K8, and with a mixture of windows 2003 DC's as well.
The child domain created fine but when i tried to make the DNS zone au. Abc.local forest wide I get the error, i can change the server to replicate to all DC's in the forest but it doesn’t work.
When i had the dc1.abc.local to the NS server is says "the server with this IP address is not authoritative for the required zone". i have tried manually copying the zone (zone transfer) this completed but is not updated. We also have issues with site replication with the following error:

The RPC service is not available, although I can ping by FQDN and NetBIOS.
the other child domains and the root domains have however replicated to the au. Abc.local DC/DNS.
I have a feeling it maybe down to IPv6or SP1 for W2K8 R2 not being installed, i have now installed SP1; I have also removed the DNS role from the server and re-added it with the same errors.
Internet ProtocolsDNSMicrosoft Legacy OS

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Mike Thomas
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Mike Thomas
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Microsoft Legacy OS
Microsoft Legacy OS

The Microsoft Legacy Operating System topic includes legacy versions of Microsoft operating systems prior to Windows 2000: All versions of MS-DOS and other versions developed for specific manufacturers and Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions, and Windows Mobile.

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