Here is something else...
I kept getting stuck on the right side of the second doorway as you enter in where the secretary is located...
I then found that your office sign model at about eye level on the right was the problem...
I then set the polygon flag and whamo... problem gone...
Then as I investigated I noticed two other things..., for example the columns on either side of the entrance also could use their polygon flag set...

I think that you might want to look at maybe setting the polygon flag on a lot of your models...
Try this... fire up the game and then hit the F11 key, notice the hull box that is used for collision of a particular item...
Then exit and go into WED and turn the polygon flag on then re-compile and fire up the game and go check out the item with the F11 key activated...
I think that you will notice how great the collision will work on those model files that you change...

Also, I wonder why you have the set of two columns and plants (the island) behind the avatar at start are all set passable???
Is that really what you want... I suppose you did that for some reason...

Anyways,
Enough for today...
Tomarrows a brand new day!
Later