Well Mark that is a bit odd. As you can see from the captures the old nav lights work on my old gal.

For trouble shooting...
I started FSX and selected the 707 from my hanger. The nav lights were off in the selected plane. I captured the photos and that is that.
This was not a saved load, but just the free flight selection. see if that makes a difference.
Try your 727 and see if they work as well. We may have a loose electron running around.  :D

BTW, how are you feeling Mark?

Lou