calibrate my pad?

[Niggo]

Hello! I have a strangeproblem calibrating my trust 830T triple mode with FMS. This kind of pad has 2 mini joystick like the PS2 pad and they are very similar to a TX. The windows calibration is perfect but when i use the calibration in FMS it seems not to recognize well the mini joysticks becouse even if the joy is set with 4 axis, FMS shows only 3 axis moving and after calibration the flight isn't so good. Any ideaa for a better calibrating? Thanks!!