Ok I tried the spirit eye thing no go.
when you come up from the serpent master the skull switch is directly in front of you and the secret door is to your right. do you have a completely black wall. I have absolutely no detail on that door no key hole nothing but balckness I believe this is a bug.. I even tried reinstaklling nothing. Dont know what to do now except possibly reset all adventures and start over again. what do you think

The key for that secret door was on the Serpent Master...use Spirit Eye in the room where you killed him.

thanks regis,
but I already have the key. My problem as I have stated is that I believe my game has a bug and it is not allowing me to find the key hole. I got the key took the left elevator up am now in a room with a switch and a black wall. neith torch infravision or spirit eye will reveal the lock to me. Im just trying to find it or confirm my bug

what secret room are you guys talking about in the serpent masters room? and if so what is supposedly in it?

I finished the temple but do not remember any room connecting to this one, just the two lifts leading out of it.