BAe Panel Project J31 panel......need help!

I downloaded the Jetstream 31 panel by BAe Panel Project and I must say its great, but if only I could get the engines to fire. I'm using it with HJG's Jetstream. I've swapped the .air files and such. But I can't get the dang thing to start, I've gone through the checklist countless time and have it printed out. The starter just hangs without progress and the battery goes to 20V after the first start.