i have problems calibrating the esky rc with fms any ideas.

my computer (WIN 98, sis display card and the rc is connected to COM1) gets the signal from my rc but i cant figure out which channel is connected to which stick on the rc,
when i calibrate more then 2 bars move and when the stick returns to the middle
the bars do not return to the center position.
any ideas? may be i am missing a setup property or a driver missing.