Why is my clutch pedal staying on the floor and doesn't spring back up?

I have a 92 Honda Prelude Si and I just changed the clutch on it. But now my clutch pedal has no pressure, I'll press the pedal and the pedal will stay down but won't spring back up at all. I already changed the Slave Cylinder. What's going on?

Have you checked the fluid in the clutch booster on the firewall? Have you checked the clutch booster for leaks? How many pressure plates and clutch discs have you had to replace in your 22 year old car?

You changed the slave cylinder. Did it get bled? I suspect air in system or it was not installed properly or clutch master cylinder is at fault. What about that rod that goes from the slave cylinder to the clutch itself?

I don't know.