What type of service was done to the clutch?
If your clutch pedal went to the floor before engaging your problem is in the hydraulics. Your RMS should not affect the hydraulics at all. I'd check the fluid level first. Then...
If your fluid level is good, try and bleed it. If you've got air in the system, it can cause your pedal to go to the floor. If it's bled properly and still not working, you may have a bad master cylinder.
If your fluid level is low, check for leaks in your master and slave cylinders. If your master is leaking you'll see an oil trail down your firewall. This oil trail could be in either the engine bay or the cab right behind the clutch pedal itself. A leaking slave cylinder may be a little harder to detect. You may have to take the inspection plate of the bottom of the transmission bellhousing and look around to see if you see fluid coming from the slave cylinder and its components. Someone else would be more help on the slave, though.