If you are tapping into a coil on plug ignition system you may have to tell the dynotune box that you have a 1 cyl engine since it is looking for RPMS x CYL out of a traditional distributor coil.
DISCLAIMER- I have zero nitrous experience. But I help where I can. I assume that you are testing this thing without actually shooting the juice right?
its supposed to be a throttle activation switch, and a window switch. and as of right now im not having a problem with it reading rpms. the instructions say to hold the two buttons to get it to go into the programing mode. my problem is the window switch wont turn on period.