Post this question in the Carnetix forums. They're good about getting back to folks.
You didn't mention wiring the 13 volt intellisense wire. If not, that is the reason the Mini won't power up.
Edit: Carnetix forums says you need a resistor in line with the intellisense wire. http://www.carnetix.com/p1900/P1900P...os/photo1.html