have desktop on freebsd

[saeedeh motlagh]

*hello guys,

i installed freebsd8.2 and upgraded my portsnap.then i installed X11 and
gnome2 and configured x11 but it does not work correctly. when i run startx
command, it has the following error:

failed to load module "fbdev"

when i install fbdev from /x11-drivers/xf86-video-fbdev the other error
occurred:
"loadmodule: module fbdevhw does not have a fbdevhwModuleData data object"

i try to change my driver from fbdev to vesa. in order to do that, i change
the name of driver in Xorg.conf but the same error happend again.

anybody knows how i should solve it to have desktop on my freebsd box?
*