Has anyone managed to get dual throttle control working?

[Khamsin]

My X65F has a dual throttle.

The left throttle works fine in game (Joystick axis z)

However, my right throttle is the problem (joystick axis u). It appears to only have two settings ... OFF and half throttle. Moving it forward gradually shows no change on the IN and OUT sliders until you get to about half throttle, at which time the OUT slider jumps to half position and remains there.

I have set up deadzones etc exactly the same as for left throttle, and have tried all the settings, to no avail.

The right throttle works perfectly in Control Panel, and in games such as Aces High 2.