Mandriva 2009.1: ctrl:swapcaps

This is what I have in /etc/X11/xorg.conf

Section "InputDevice"
    Identifier "Keyboard1"
    Driver "kbd"
    Option "XkbModel" "pc105"
    Option "XkbLayout" "us"
    Option "XkbOptions" "compose:rwin,ctrl:swapcaps"
EndSection

The swapping of control and capslock did not work out.
Only the ",ctrl:swapcaps" was introduced by me.

What is the problem?

-C