Can’t remove the barrier in Brecillian Forest

dragon-age-origins

It's my first playthrough and I'm at Nature of the Beast. Now I helped the Grand Oak and returned his acorn by trading it from the Mad Hermit before I even encountered the barrier.

As I understand, either the Hermit or the Oak will help you if you side with them but I seem to be locked here. The Hermit says he will help me if I kill the Oak, but I can't talk to the Oak. It only greets me and I get no dialogue options. Also, it's not hostile so I can't attack it, so now I'm stuck. Is this a bug or is there another way of removing the barrier?

Best Answer

Solved it. It seems that giving the acorn to the Oak made the Oak Branch appear in my inventory without me knowing. Appearently, the Oak knew beforehand that I needed it.