My FSNav doesn't allow to let 767 PIC to auto fly the entire FSNav flight plan. How can I let FSNav do this ?

Paul,I fear, your question is hardly to understand. You

FSNav will control the PIC767's lateral movement (I think, never actually tryed it) but from other posts I've read, it diffenitly will not control the PIC767's vertical movement. This occurs due to the fact that the PIC767 does not use the default M$ autopilot, which FSNav works on. I recommend you take a couple of hours or so and learn how to use the PIC767 FMC, it's by far the best one out there. Once you learn it, you'll never go back :DRyan-Flightpro08 :-coolTaxiwaysigns.com

Umm, why use FSNav when you have an FMC that's identical to the real thing?? Just use FSNav as a moving map and let the PIC FMC/autopilot fly the airplane...