The same problem with different DK specs...at first hand.
But after i started the profile _outside_ of Tol Barad, the bot moved in and is working fine. Maybe theres something to tweak with the context check, as he might have had assumed i?m in Tol Barad PVP-Area, and not the quest-context.
Just my two cents. Will check back hunter later. The DK Unholy Daily quests are working by now.