i am having issues with flight simulator 9 and third party addons not showing their menu.everytime that i click in any of third part addons, they just stay at black screen, but if u alt-tab, you can see the addon menu.this is weird, since you can't configure the addons.someone know a solution for this?using windows 7 ultimate 64bits

There have been many posts about this. I have heard many explanations, but no solutions, many say its related to Nvidia drivers and Windows 7.I have windows 7 64 bit and a GE Force 470 card, and I am experiencing the same problem. However, there is a workaround. before you access the addon menus on the top bar (PMDG, FSUIPC, LEVEL 3 etc) go to view and click off the full window. IF you open FS in a window the problem goes away. After you do what you need to do with your setup go back to full view.I sometimes forget and I get those black screens again.Juan