After some hours searching the Brazilian foruns... I Find how I can disable this:
The procedure in others distros is changing the line init:5:init to init:3:init in inittab.
This doesn't work on Debian.
To don't load KDE, I must edit this file:
/etc/X11/default-display-manager
and put a '#' in front of this line:
/usr/bin/kdm
That's it. Reboot the Debian (or Kurumin) and KDE is no longer loaded.
I found this information on Oficial Kurumin Forum, at:
www.guiadohardware.com.
Anyway, Tks for your help.
MarcSant.