problems with XFree86

[Blaise.BATISSE at ifaedi.insa-lyon.fr]

Heelo,
I'm working in France for the CNRS and I just installed FreeBSD 5.1-
Release-i386. The installation was successfull but now I don't manage to
open any graphic environnement (neither KDE nor Gnome). The error
is : "error in locking authority file /home/.../.Xauthority". I consulted
the file names ICEauthority and it is empty, that is strange... Do you
know where my problem could come from ??
Thank you very much if you got any answer cause I do need FreeBSD very
quickly !
Blaise BATISSE