Zoran Nasev - 2005-12-03

I am trying to start zbdesk on Mandriva 2005 but without success.
I can't find a line in .Xsession that starts a window manager.
In /etc/X11/wmsession.d there are two files 01KDE and 07IcWM. They both have lines:

EXEC=/usr/bin/startkde
exec /usr/bin/startkde
(starticewm for IceWM)

I tried to change exec line with:
/usr/local/bin/zbdesk /usr/bin/startkde
but when I try to log on, on the upper left corner shortly appears zbdesk message and after that I am back in the logon screen.

after that dmesg has line:
mtrr: base(0xe0020000) is not aligned on a size(0x300000) boundary

can somebody help me?