Elevator problems

[oblivion2k]

Not sure whether to post this here or tech support, so I posted here as I imagine I'm just doing something wrong. Everything is in perfect order with the elevator, except for the pressure levers. I managed to find a way to get

Spoiler below!

8 up, 8 down

without using the final lever. I believe it was down, up, up, down, down, neutral, or something like that. Anyways, now I realize that that's wrong after consulting a walkthrough, and when I tried to change it, the levers are locked in place, except for the last one that I left neutral. They move just slightly, and then stop, no matter how I pull or push. Am I doing something wrong? I tried turning off the furnace in case the steam pressure kept them locked in place, but the furnace lever was locked in place too. Help please?