tbh m8, the manuals are pretty crap, they sort of tell you what to do, but not why you have to do it.
If you've wired it right, it should show rpm's, make sure you are on the correct wires, i think keiron may be right about the solenoid/rpm thing though.
Basically, duty controls how much your solenoid opens (ie how much your wastegate is open). I think its something to do with how many times it opens per second, but thats not important :?
All you have to do is tell the avcr how much boost you want to run (ie 1 bar).
Then you tell it how much duty it will need to use to run the boost you want (ive never understood why it cant work it out for itself).
The unit will then self learn, (instead of a duty setting, you will get 3 stars)and adust the duty slightly to make the boost level match what you want it to.
There are other things you have to set (ie what type of thottle, how many cylinders etc, but the manual tells you all that, make sure you set the boost sensor to the right type, or you will not be running the correct boost).
Any more probs, let us know