My '93 Sunrunner has sat for about 8 months as I have been working on the body. I am still not done, but needed to move it yesterday. I started it up, no problem, but when I tried to engage the clutch, nothing. I feel what seems like the normal amount of resistance on the pedal, but it will not disengage or re-engage anything. It was working fine when I last moved it, so what could it be?