Disappearing PMDG Menu in FS9

[flymd88 0]

I had this really weird problem after recently installing a new GTX 460. When I try to click on the menu at the top of the screen to change fuel, options, etc. i get a black screen. Has anyone else had this problem or know how to fix it?Add-ons installed: PMDG 747, MD-11Running Vista 64 with a GTX 460Aaron Forte