@CoaCoaPuff
Hi…
I have the WW F/A-18 throttle, so I can only guess for your problem, but I try:
1. in SimAppPro make sure the ANT ELEV knob is configured as an axis.
2. In the DCS controls config menu: choose „Axis Commands“ and then select ANT ELEV. (I am saying this, because you could also assign ANT ELEV up and down to buttons and then it wouldn‘t recognize if you move an axis instead).
3. When you assign the axis, move it all the way to the extremes. I‘ve observed, that it is only then being recognized and assigned.