Black doors in DS2

[lokum13]

I've been playing about a week and have had no problems until I got to Windstone Fortress.
One section of the Gatehouse has a black doorway, which I cannot pass through. I dont think it was crucial for me to enter that room, since I was able to finish the quests in that area.
But now that I tried to go into the Temple of Xeria, I see that the first 2 doorways are blacked out. I can not enter those rooms.
I know that I'm supposed to pass through them, because the arrow on the map points in that direction. So now I'm stuck.
I've installed the patch, but still have the black doorways.
Anyone encountered this problem? Is there a solution?
Thanks!

[chucklescdm]

I am at the Eastern Windstone Gatehouse looking for Private Banos. I am at the
room just north of where he is supposed to be. The room south of here just has
black doors and I can't get through them to get to Private Banos. Is there a hidden switch that opens these doors. HELP!!!

[swcarter]

The one time I had this problem, it went away when I exited and loaded my game. If anybody has a better solution, or knows what causes the problem, please post it here.

SWC