While using PMDG 737-700, menus disapear.......

[N051391]

While landing or approaching with the PMDG 737-700, the menus on the top of screen (File World Options, etc) always disapear. I alos hear a error tone, but no window appears. Can someone tell me how I can fix this? It never used to happen and i didn't install anything else. I've been running in windowed mode. Could someone help. I appreciate it.

Thanks alot,

Alex

[Tom.]

Try running in full screen or try using This