I purchased PMDG Jetstream 41 software for my FSX last week.> > All downloaded what appeared to be correctly and indeed the aircraft loads> OK.> > I have a problem when I come to turn on the Master avionics switches on> the overhead panel. The switches with the guards works OK and I turn both> on, BUT the avionics displays (Captian & Co-pilot) on the flight deck> panel do not respond and remain inactive.> > I have stripped off the programme and re-loaded just incase something did> not download OK. I downloaded again and once again everything else is> working except the Master Avionics panels.Any comments please on how to fix would be much appreciated.Thanks,Martin