Mary, the pipe and controls on the left are for the gate across the train track. You need to be using the ones on the right. If the gauge rises when you turn the valve, you're in business; if not, go back to the steam room and open (turn to the left) the 3rd valve from the left.
Back with Amanda, pulling the lever moves the magnet toward the rocks; pushing it moves it toward Amanda. It takes several pushes or pulls to move it the whole distance. Before you get it moving it's directly over your head so you can't see it until you move it.
Hope this helps. Let me know if you need more help with it after you get it moving.