We use it every day. Are you using the latest MP?
Yes MP version 1.2.74, simlink connects ok but, but the HUD jumps about all over the place and when I switch to auto or stabilize the control surfaces go beserk trying to compensate for the flight data that's making the HUD jump about.
I'm using an APM1 2560 and X-Plane 9.2.
Ah. that's the problem. The old X-Plane 9.x is no longer supported. We only support X-Plane 10.x. Please see the manual here.
That explains it, I had missed that update, I'll invest in X-Planes 10 then.