Help with assigning a keyboard command on CH Flight Sim Yoke

[greg100o 12]

I am trying to map engaging or disengaging the autothrottle to button 10 on my CH Flight sim Yoke. In FS 9 this has assigned key Shift R by default. Using FS 9 I then assign the shift R function to button 10 on CH joystick.Load default fs 9 747 and the button works fine.Go to PMDG 747 key assignment function and assign Shift R to MCP Press AT. If I press SHIFT R the AT switch goes up and down as it should. BUT, the button does not work to do this same effect in 747 of PMDG. I must be missing some simple thing and wonder if anyone could help me on this one.ThanksGreg

[greg100o 12]

I wanted to bring this up one more time since no responses. This joystick programming was suggested in the first tutorial.Greg