Hi, I am experiencing some problems with my AFPD simulator.

It has been running fine up till now, but for some reason the ailerons will not trim out properly, by this I mean I can calibrate them and its fine but when testing them on a model I put left in and the right aileron rises a little bit first then the left aileron goes up which is correct and the same happens for when I do this with right aileron.
This means during flight the ailerons can never be trimmed properly and doing a slow roll properly is impossible as the plane rolls right first for a left roll and then proceeds to roll left!

Can somebody please help!

Graham