Hello,
I am really having a tough time trying to figure out what is going on with my autopilot and PDMG a/c.
I filed a flight plan from KBOS to EGLL.. About 20 minutes later after reaching 350 (cruise altitude), the plane started to descend on its own for no apparent reason. I deactivated the AP and re-activated the AP. The plane will not respond to it nor any manual control of ailerons, rudder, not elevators. Some of the buttons on my Siatek controller still work, but not the yoke or throttle control. After 6 hours of removing every add-on , scenery, weather, atc add-ons i have, I was able to make things work again.. The thing i found was when i inserted/re-enabled FSUIPC module again, the problem returned. I then removed it again, rebooted the machine , started FSX and the problem went away... The only thing i can recall is that i downloaded the latest FSUIPC several days ago...
Jim