can't launch X

[dko]

i have a stable debian and i decided to upgrade it to unstable release.
now i can't start KDE anymore.
when i launch startx i have the following error message
 X: cannot stat /etc/X11/X (no such file or direcotry), aborting.
giving up.
xinit: connection  refused (errno 111): unable to connect to X server
xinit: No such process (errno 3): Server error