Add on aircraft frequencies won't display.

Help, only my default aircraft are displaying the frequency numbers on their radios. PMDG 737, PIC 737, Airbus Vol 1 deluxe and Level D 767 just show blanks where the frequencies should be. Also, on most of these aircraft, I get blanks where Autopilot variables e.g. ALT, SPEED V/S etc. should be.I have tried uninstalling then reinstalling but nothing. The frequencies change if I "move" the knobs but they just won't display!N :(Edited... Now none of my aircraft are displaying their frequencies Auuugggghhhhh!!!!What would cause this?Latest Edit,After all I have tried this afternoon, I tried turning the computer off and restarting it. I'm embarrased to say....That fixed it.Oops,N