My GNOME2 cannot work!

hi,
I have use these commands to install GNOME to my new-installed FreeBSD 7.0:

pkg_add -r xorg
pkg_add -r gnome-session
pkg_add -r gnome2-lite

and then,I reboot my computer and use user Bear to login.
then I type in

echo "/usr/local/bin/gnome-session" > ~/.xinitrc

then I type in 

startx

but it give me a error
the summary of the error is below:

Could not lock the file "/var/tmp/gconf-test-locking-file-CB9IKU"
The error was "Invalid argument"(errno = 22)

What Can I Do??thx!

BTW:I have been set my PACKAGEROOT to ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-current/Lat
est/

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Bear
2008-11-16