Help with setxkbmap

["Pedro I. Sanchez" <pedro.i.sanchez@altavista.net>]

Hello,

I am running Debian 2.2 (stable) plus some helix-gnome stuff. I want to 
use setxkbmap to switch the keyboard mapping but always get the 
following error:

# setxkbmap          
Couldn't interpret _XKB_RULES_NAMES property

What does this mean? Any ideas on how to fix it?

--
Pedro