Ok, I've gone as far as I can figure out. I've entered the keep itself with the other Vhanti, done everything on the first level, and am now down to the second level. I've read the walkthrough, but my deal is that the lever to open the east portcullis NEVER APPEARS. Or if it does, I can't see it. I've fully explored the area to the south, killed the guards past the portcullis to the east, but I can't find the lever. Any ideas?