We are in the main gate at the NE corner of the map. We cannot enter the doorway in the top right of the chamber, it is locked by a mechanism. We have tried the sanctum key and it will not work? Can anyone help!!

The Sanctum Key is deep within Kresselack's upper tomb. You need the GATE KEY found in one of the crypts outside in the Vale of Shadows.

Where exactly is the GATE key!!!

VOO VOO! I'm going to slap you silly with my bow you fool ;)

Learn to EXPLORE.

It's in the VALE OF SHADOWS in one of the crypts. Not the one you're in and not the one below that either. It's in a cave. Explore the area and you'll find it.

If you are at where I think you are, check to the right and left of the door here. There are some triamgle shaped things on the wall that say they are some kind of mechanism. If this is so, you need to look for a switch.