I used yum groupinstall "KDE desktop" "X Window System"

I modified the /etc/sysconfig/desktop to include the following two lines;
DESKTOP = "KDE"
DISPLAYMANAGER = "KDE"

Also I verified the content of the /etc/X11/prefdm file which I include below.

after reboot still my default desktop is gnome!

Any help on how to change it to KDE?

Thank you
___________________________________________________________________________
#!/bin/sh

PATH=/sbin:/usr/sbin:/bin:/usr/bin

# We need to source this so that the login screens get translated
[ -f /etc/sysconfig/i18n ] && . /etc/sysconfig/i18n

# Run preferred X display manager
quit_arg=
preferred=
if [ -f /etc/sysconfig/desktop ]; then
. /etc/sysconfig/desktop
if [ "$DISPLAYMANAGER" = GNOME ]; then
preferred=/usr/sbin/gdm
quit_arg="--retain-splash"
elif [ "$DISPLAYMANAGER" = KDE ]; then
preferred=/usr/bin/kdm
.
.
.



____________________________________________________________________________

Maybe the last session preference is still remembered for the user account you are testing with. Is there a file

?

If it is there, try deleting it or moving it out of the way while the user is not logged in graphically, and try again.

also with 6.4 you are going to have MANY MANY near unsolvable problems
6.4 is UNSUPPORTED !!! DO NOT USE!!!

upgrade to 6.6 FIRST !!!
then worry about the KDE desktop


also on the GDM login screen AFTER you type in your user name a option becomse avaliable to SET the desktop

select kde in the pop up menu