Illegal syntax on using NTDSUTIL to remove TAPI Microsoft Directory

I was trying to demote an old DC through DCPROMO when I got the message pop up "This domain controller holds the last replica of the following application directory partitions:
DC=MSTAPI,DC=yourdomain,DC=com"

I am getting an error when trying to remove a domain through NTDSUTIL.  I am following the MS article KB 282272 and when i get to the "To remove the application directory partition replica, type remove nc replica ApplicationDirectoryPartitionDomainController" step, i get an illegal syntax when i type the listed naming context.

I type remove nc replica DC=TAPI3Directory,DC=MyLocalDomain,DC=com then i get the syntax error 80070057.
Any help would be greatly appreciated.