Try this tutorial:
http://www.justflight.com/supportfaq...-of-dover#FAQ2
Maybe sensitivity is too low - watch these green lines Out, In.
If dont work, try, go to
...:\Documents\1C SoftClub\il-2 sturmovik cliffs of dover
Rename the file ConfUser.ini
Open Clod - a new ConfUser.ini is created
Try assign/configure axis again.
Sokol1