One joystick interface channel not working proplery?

[vpp]

Hi Guys,

I am not new to FMS, but have only just returned to it after a period away.
I have a problem with the interface connection - I am using an oldish Ikarus Game commander on Comm 1 and have set the joystick up as it should be.

However, when I try to calibrate it everything functions OK except the elevator (No.3 channel), which jitters about in the centre. There is no proportional control and when the elevator stick is moved the bargraph just jumps suddenly from bottom to top.

I know that the controller is OK as it works perfectly with RealFlight.

Anyone know of a fix?

Thanks