adprep /rodcprep error

I am trying to run adprep /rodcprep.  I am receiving the following error:

Adprep found partition DC=DomainDnsZones,DC=corp,DC=********,DC=com, and is about to update the permissions.
Adprep could not contact a replica for partition DC=DomainDnsZones,DC=corp,DC=*********,DC=com.

Adprep encountered an LDAP error.
Error code: 0x0. Server extended error code: 0x0, Server error message: (null).

I received the same error for ForestDnsZones.

So I researched, and found this KB article:  http://support.microsoft.com/kb/949257

I created the fixfsmo.vbs script as they discuss.  I ran it on my domain controller for ForestDnsZones, and it succeeded.  However, I ran it for DomainDnsZones, and I then received the following error:

DNS name: DomainDnsZones.corp.*********.com
Using DC *currentdomaincontrollername*.corp.***********.com
infra fsmo is CN=NTDS Settings\0ADEL:965c468f-9ad1-4921-a670-f8dbba8bd2a4,CN=*servernameofdomaincontrollerthatnolongerexists*\0ADEL:8ba3a1a1-9dee-4043-a143-9571bac9f36c,CN=Servers,CN=*sitename*,CN=Sites,C
N=Configuration,DC=corp,DC=*domainname*,DC=com
C:\Users\dhumes\fixfsmo.vbs(42, 9) Active Directory: The server is unwilling to process the request.

Can someone assist?

Thanks,