Thanks for the response guys,
Not sure about the registration suggestion, but when I purchased the PMDG 777 I installed the ser key when asked and all was fine. The game excepted it and I was on my way. I am including a cut and paste from another post (with no resolution) with the same problem. http://forum.avsim.net/topic/427976-pmdg-777-gauges-error/
Stephen McRae