For some unknown reason and peculiar to some panels the auto pilot heading,course and airspeed can only be incremented by 10 and Altitude and vertical speed by 100. I believe the problem lays within FSUIPC, however this is not so according to Pete Dowson. As a purist I find this annoying, particularly when it is not common to all panels, if you know how to fic it I would be grateful.
If you have any problems with gauges or sound add the following to your FS9.cfg file