Disappearing Main Instrument Panel.

Hi All:I have a registered version of FSUIPC 4.02 and also added AS for FSX.I have noticed that frequently the Main Instrument Panel will disappear and I am left with a black screen, replacing where the panel was.I have been trying to track the cause and it appears to happen during the times I have initiated the weather programs whether it be the default or active sky.Sometimes I can get the panel back in its place if I change views several times.I do not believe it is a problem with FSUIPC because I don't believe it touches the actually graphics for the program.I even left the aircraft stationary without starting it and after several minutes it went from the 2D panel view to the spot view with out touching anything.Again I had weather loaded when this happened.A possibility may be that I do not have the sliders positioned properly although I am getting 15 FPS most times.Any comments would be appreciated.I have a dual core with a GF 7950 video card.Kenny G.