Hi Bobby,

Guess what, I finally have my AP fully functional.
Well to tell the truth, I have installed CS 757 on a spare computer freshly formatted with Windows 7. Now everything is fine. What a pleasure to watch my aircraft smootly turning and crusing along its path :D

Probably my problems were not related directly to CS 757 but to my FSX config (lots of sceneries and other aircrafts add-ons installed). As I did not manage to isolate the problem I cannot give any piece of advice to those who are experiencing the same AP issues. Formating the whole drive and reinstalling from scratch was obviously the last option in my possession...

Anyway, I wish to thank all of you who tried to help me on this. Much appreciated. Have a safe flight with the AP on or not ! ;)

Greetings from France