Hi Pete!
I'm also using FSUIPC with Aerosoft Airbus to have some internal controls of the aircraft mapped out to my Saitek X52 with the help of the Airbus X lua file. On the buttons+switches tab I assign every button as an FS control and I choose the appropriate parameter from the lua file.
Not too long ago a strange issue came up: I cannot select flaps 2. Yes it looks strange to me as well. I load the sim, takeoff, cruise, and on the approach I can do everything, flaps 2 remains unselectable. As I press F7 for a short moment the display changes and the lever moves, but after that short moment it goes back to flaps 1 position. I can select flaps full with F8 and then Flaps 3 with F6, Flaps 2 still unselectable.
I don't say that FSUIPC is the reason for this malfunction, I just examine everything I use aside from the raw FSX, and I just ask you whether you know about this problem or you have a good idea what should I do with it. If you have please share it with me.
On this link you may find my FSUIPC.ini, the AirbusX.lua, and a picture of my button assignment process.
Thanks a lot for your help!
Regards,
Adam