Like the other fellow said it could still be your hydraulic clutch. Since it is still holding fluid, maybe you should double check the clutch pedal operation, i would crawl under the car and have someone push the pedal while watching the clutch lever at the transmission for movement.
If the clutch pedal seems ok, you could need a new pressure plate. (I had the same thing as you describe happen on another car, the pedal worked the clutch fine but did not activate the clutch. It turned out the pressure plate was kaput.) In other words, you might need a new clutch (includes pressure plate, clutch disk and throwout bearing and the pilot bearing replaced).
If you have a whole lot of miles on this clutch or just dont know when it was last changed, this is likely to be the problem, if you are not sure, have it checked at a shop.
Heres what the parts look like if you are not familiar with a clutch. If you have it done its about $400- 500. Do it yourself and the parts are about $200