remove the clutch actuator and make sure it's centered in the transmission..there's a little rod with a cap on it, that's what you want to center. That is most likely your problem right there. I've ran into the same situation.
http://www.matthewnguyen.org/mark/up...chactuator.JPG
The part i painted red is what you need to make sure is centered. When new it is held in the center, when used (if reused, or it's broken the new ties down) you'll have to manually center it yourself. Make sure no one pushes on the pedal when you're trying to get it in.
I think that will solve your problem though.