I have built a simple cockpit with a customised extra keyboard (USB), I programme the the 737 autopilot MCP buttons amongst others using the PMDG keyboard mapping menu.Everything works fine, the next day I start flightsim and my PMDG 737 the keys are mapped differently. This does not help me as my extra keyboard has labels on them which indicates which button to press.How do I stop the customised buttons from changing, I fly alot on VATSIM so any help would be appreciatedThanksSteven from Oxford

The only time I had trouble with 737NG key mapping was after installing the 747. You didn't mention if you went into the MSFS key assignments and deleted any that would conflict with the PMDG assignments. I delete all that I don't actually use.