Over the past few weeks, FS9 has been acting strange. For some reason, whenever flying, if I select another aircraft to fly, FS9 crashes, or if it does happen to switch to the aircraft I selected, the gauges will not work. I have tried 3 fresh installs in the last week, and the problem persists. I have also noticed that AFCAD will not list any airports when I use it. This is first for me, I've been using FS9 with Windows 7 for over a year and never had this problem. Any help/suggestions would be appreciated.