Hi there TigerBob
Can be frustrating with the FSUIPC thing, but once you get it its great. I dont use the CH manager as thats to much for me, and FSUIPC works just fine. Now to your question. Try this:
1. Calibrate your CH Quad in windows, being sure to keep all stick in the middle (use ruler as this helps keep them straight)
2. Open FS9 and make sure in the control/assignments tab that you have assigned each lever to the throttle you want it to control. You should have 4 throttles to assign here.
3. Check that the sensitivities sliders are at max and no null zone
4. Open FSUIPC and go to page 3 wher the thottles are
5. MOve all throttles back to the detent position
6. Starting with no 1 throttle, pull it all the way back and click reverse, then up to the detent holding slight pressure back and click the bottom idle, then push it forward to the top end of the detent and push the top idle button, then finally all the way up to the max position. DO this for all 4 throttles.
There is no reason why no4 should not work, unless you havenet assigned it in FS9. The numbers dont really matter so much in the calibration of the throttles`
Hope that helps a little and sorry for rambling bro
Doug