95 Ford Probe 2.0 4cyl. Cluch problem

My cluch pedal went all the way to the floor and im not sure exactally which part has failed. The cluch master cylinder or the slave cylinder. My cluch cylinder feeds off the master brake cylinder and I tried bleeding the line at the cluch cylinder but get no fluid or air. I noticed when I had to drive it home I could push the cluch pedal real fast and it would allow me to change gears, but other than that it would just stay on the floor. Can you tell me what you think it might be. This has been a great car for the past 11 years and has 140,000 miles. Thanks