help me, i can't start graphical interface in freeBSD 8.1

[Edgar Rodolfo]

Hello, i am trying freebsd 8.1 from dvd, but i can't start graphical
interface, gnome2 or kde4, when i am installing i chose all, then
after it installed, after package selection i choose gnome2, kde4 and
x window system based utilities, i choose xorg-7.5 then i put x, y
others packages are in D, is it correct? y handbook i don't see ,
there only seen install generic, my conexion is very slowly...i can't
use cd /usr/ports/.../xorg make install clean
i add in /etc/rc.conf, echo 'gnome_enable="YES"' >> /etc/rc.conf,
also, echo 'hald_enable="YES"', echo 'dbus_enable="YES"', also i put
echo exec gnome-sesion >> .xinitrc, :(, when i started startx, the
message is:
exec gnome-session: not found
waiting for x server to shut down failed to unset mtrr: Device not configured
xauth: (argv):1: bad display name "edgar.localhost:0" in "remove" command
in handbook say that xorg 7.5 no configured, default startx,it  will
start,  don't know, help me please, i want to learn freebsd
note:handbook
5.4.2. Configurar X11

A partir de la versión 7.3 Xorg puede funcionar sin utilizar fichero
de configuración; basta con teclear en el prompt:

% start
excuse me my english is very bad :(

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