Hi Dean, if the fluid levels are OK then it is one of two things the master cylinder on the pedal is at fault or the slave cylinder inside the gearbox/bellhousing you can try this if you have a helper, press the the clutch pedal and at the same time get your helper to open the bleed nipple on the slave cylinder if fluid comes out it means the master cylinder is OK and your fault is in the slave cylinder, which means a gearbox out job!!
nigel
May 2008