I installed a digiflight 11vs in my RV7A. I can't get the autopilot to go into nav mode. I have followed the TruTrak instrutions for a GX65 and tried all the setup combinations for pin 5 and pin 22. The GX and the Autopilot are communicating but the autopilot will not go into the nav mode. Anyone know what I'm doing wrong or not doing. Thanks