Joystick problem

[Ideka]

I've been trying to use a Wiimote and a Nunchuck in Wine, and mostly they work fine, but the analog stick is giving me trouble. Here:
http://forum.winehq.org/download/file.p ... view&id=95
the square in POV jumps around seemingly randomly as I move the stick.

It works fine outside Wine, by the way.

Thanks in advance.