can't believe i got it working!.....i deleted all 737.....and rather than re-downloading the 737-100 ext in my account, i went way back to my original 737-100 ext., with the original order number and installed it...and that of course worked...then i installed the present 737-200 base pack...and now it works.....a miracle....happy camper...(although the 100 uses the default panel)