This is a link to the Setup Guide http://www.apneaboard.com/manuals51/REMs...pGuide.pdf
You need to go into the clinical menu and check the pressure setting and rate as you put into your last post. The "rate" is the backup rate for machine initiated breaths, and I think that is currently OFF on your machine. It needs to be on at 8. That is actually a pretty low backup rate, and after some experimentation, you might find a higher number is more comfortable.
If after reading the setup guide, the terms are still "Greek" you should arrange to take the machine to a professional for setup. It would be at most a nominal fee.