Don't know what to say. I have the deluxe edition, and I have never had that problem. Best thing I can say is to first restart your computer. That solved a problem I had with parts of the planes scattering. If that fails, than do a clean uninstall(refer
http://www.simviation.com/cgi-bin/yabb2/YaBB.pl?num=1197380641). Best I can say, but that should do it.