Sounds you haven't found the scroll with the reveal spell yet. When you're in the right room (you can't exit through the door you just entered), jump over the collapsed statue/tunnel to your left, then loot the corpse you'll find on the other side. The rest should be self explanatory : )
Edit: Oops, didn't read the last part of your post, ggm261. Sorry!
Last edited by BeZ; 02/01/10 05:26 PM.