I'm on the level "The Rose" (Level 6? Marathon 1 - it's the one where the aliens are attacking the humans) and I'm in the room with the terminal where you can save the game. There are a couple of other rooms, with windows too high to reach, as well as a lift. I can't figure out how to make the lift work. I have found a switch, but all it seems to do is turn the lights on and off. How do I get out of that area?