I have two FS9 aircraft that I've been flying in FSX now for the
past week or so. The planes in question are the FSDZigns L-049A
Connie and Rick Piper's HS-748.

Most of the time I can complete flights with no problems but
occasionally, usually after about 1 hour of flight time, FSX seems
to "lose focus" for lack of a better term. What happens is that
I can no longer control the engines ( throttle/prop/mixture )
or the flight controls with my stick/throttle or with the mouse
by clicking and dragging.

I can still click on panel icons OK and tune the radios, set the
autopilot, etc. It just seems to be the engine and joystick/throttle
functions that have gone away.

I can still change throttle/pitch/mixture with the appropriate
keyboard commands. Using the "Aircraft Reload" command
in flight does not correct the problem. The autopilot will still
control the aircraft correctly.

Last night in the Connie I was on approach to EPWA and knew
the engine controls were gone so was controlling via keyboard.
I had a good lineup on the runway using autopilot in approach mode.
However, as soon as I switched off the autopilot 1 mile from
touchdown I found that the joystick was inop. It was messy

Other FSX vs FS9 related problems I have noticed is with engine
start. Both the Connie and HS-748 have controls/procedures for
starting the engines but these do not work properly in FSX.
Autostart appears to work, most of the time, unless I try to
manually start the engine, then autostart may or may not work.

I have also noticed this problem with FSX default aircraft...Beach Baron,
for one. My "default" aircraft in my saved default flight is the
Connie, cold and dark. This may be contributing to the start
problem but I don't think it has any bearing on the in-flight
loss of control.

Any insight out there?

  Paul