clutch problems?

I have a Ford Tractor Model 2000. Tractor worked fine when i parked it, but when i started it up the clutch will not inguage, it will not go into gear. What is wrong with clutch? The clutch pedal feels the same, do i have to break the tractor in half to get to the clutch. I can start tractor in gear and it works fine any ideas on problem? Would appreciate any help. Thanks