Check your PM. I will work with you via e-mail to completely track down your problem. You either don't have the right line in the panel.cfg, you don't have the gauge file, or it is corrupted. It should be easily solvable step by step. Regards, Bob.

I would first just try it with the default 737-400. This way you know you are setting it up correctly. Then try it on the PMDG. There have been issues when working with 3rd party payware aircraft as a lot of their stuff is proprietary and it just might not mingle nicely with their aircraft.

No worries with the default 737, it worked!