I must be an idiot. I found lots of posts requesting the solution to the lift puzzle, but everybody seemed to be able to find it. I can't seem to find any new parts of the temple. I've summoned the spirit of Xyuda(??), followed her into her chamber and killed her, but then couldn't get out. there was a closed gate, but no levers or locks to open it. I figured i must have failed to do something. after reading the posts here, i figured it must be that i didn't get to nada first. so i went back to a saved game before summoning the spirit, and tried to find this darn lift maze room, but to no avail. the party grows weary; spirits are at a low. help needed.

IN the room where you kill the Naga there is a fountain sort of thing (don't you love these precise words?) in the middle of the room. There is a switch on that which is very easy to overlook!
Hope that is what you overlooked!

Wyv