-xkbmap parameter not working?

[Hrafnkell Eiríksson]

Hi

I can't get the -xkbmap parameter to work. I want to use it to
set the keyboard layout to Icelandic. Issuing "setxkbmap is" from
a shell after I log in works (though I have to issue it twice for
some reason). I though that adding "-xkbmap is" to the XWin.exe
command line should do the trick but it has no effect.
The XFree installation on my Win2k (cygwin) host has all the
xkb mapfiles in /usr/X11R6/lib/xkb/

What do I have to do to get this working?

Thanks
  Hrafnkell