Im in the barracks at the archery range with the "Champion" archer whos cheating and stuff.

Anyways, theres the 4 levers in the 4 corner rooms, and a door on the left side that mentions those 4 levers.

I've pushed all 4 but the door's still locked, anyone know how to work this?

Also on the same map, when the corridors branch off 3 seperate ways (Archery range being the left path), how do you unlock the door off the right branch, you pass 2 storerooms then come to this locked door that I cant open.