Installing FreeBsd with X prob

Hi all,

After spending the last couple days installing Freebsd. I managed to get
X up bare. Apparently the X server is up with a blank screen and no way
to shut it down. I'm trying to run kdm,sometime it would work if I cd to
/usr/local/bin and type kdm. Otherwise I got a blank screen.
Any help would be appreciated.

Vanh