Machine Room glitch/ug

[DawnStar]

Hey everyone, recently I got Amnesia: the Dark Descent for my laptop and it works fine until I got to the machine room pressure levers. To my horror two of the levers on the far left side are "stuck together". Therefore preventing me from progressing. I have all three of the rods, I added the gears and coal and all that's left is to manipulate the pressure levers. The levers won't move at all. Any help is appreciated.