Xfce doesn't start, gnome too

Question

hi there,
i'm new here and I'm also new on archlinux
I've recently bougth an Athlon 64 3000+ and I want to use a 64bit distro to run calculus programs as Octave (never used calculus programs under linux, but I presume that they are faster than other appz on win/linux 32bit)
I've installed base system through CD, and with Pacman I downloaded nvidia drivers and configured X11 by XF86Config file, i think that there are no errors here.
I read italian/english tutorials for install xfce4-svn, and with pacman I do all... but when I type startx... It seems to start but few second later: 
/opt/xfce4/bin/xfce4-session: no such file or directory
/opt/xfce4/bin/xfce4-session: Success!
waiting for X server to shut down FreefontPath: FPE "usr/share/fonts/misc"
refcount is 2, should be 1; fixing
root@liquid /: #
if I type xfce4-session:
/opt/xfce4/etc/xdg/xfce4/xinitrc: line 49: /opt/xfce4/bin/xfce4-session: No such file or directory
so I downloaded gnome and gnome-extra, added some daemons as tutorial, but when I type gnome-session:
gnome-session: error while loading shared libraries: libcairo2.so.2: wrong ELF class: ELFCLASS32
here there are problems with 64bit?
where I do wrong?
thanks in advance

Answer 1

AndyRTR wrote:
huz wrote:/opt/xfce4/etc/xdg/xfce4/xinitrc: line 49: /opt/xfce4/bin/xfce4-session: No such file or directory
Agent pid 2642 killed
Try to "touch /opt/xfce4/bin/xfce4-session" ;-)
the file points to this path,
I look into this dir, and the file xfce4-session exists, but if I type: xfce4-session
no such file or directory
the file exist! I do not understand how linux works
Anyway, on KDE firefox doesn't start, gaim doesn't start, nvidia control panel doesn't start. mmh... good