It is a wildshot, but take a look at the
Can't speak with Lenton thread and see if that will help.
The reason I think it possible could work is because of the faction change, but I am far from sure.
There are other "setfaction" commands but I've not messed around much with them, so I can't tell if others would work better, but can try it out later, when I get a little more time.
Would be easy to try out, but haven't time to try right now.
Otherwise - I am not completely sure I remember right, but I don't belive Fort Ilkard is plot-critical, so possible - you don't have to do any quests from there. You can check the walkthrough for the area if you want to check up on it.
Hope some of this helps.