test lab 70-410 problem? adding DC

has anyone run into the below, i am trying to add a DC to an existing forest.
"verification of user credential permissions failed. you have not supplied user credentials that belong to the domain group or the
enterprise admins group"
"verification of user credential permissions failed. you have not supplied user credentials that belong to the domain group or the
enterprise admins group"
Comments
Is your forest root administrator account in the Domain Admins or Enterprise Admins groups in AD Users & Computers?
Edit:
TechNet articles: Adding a DC to a existing domain & Adding a DC to a child domain of the forest.
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