If I remember correctly, with the 9Z - I assume it's the old 9ZAP, ZAPS & the WCII - when you flip the D/R, the ATV & the P-mixes will change. Meaning, let's say you've set your ATV to 110% for your normal flying, when you turn on D/R, the ATV will switch it back to 100% - it will not automatically carry the new set values over. I've learned this the hard way at a contest about 10 years ago, I've set my throttle ATV to a certain value for normal flying. However, when I flip the D/R for my ele, it cuts out my motor.

The way to check it is to go to the ATV page, see whether the value changes when you switch on D/R. If it does, all you need to do is to enter the same ATV value when the D/R is activated.

Adrian