VirtualBox not opening... from 7.2 STABLE, (GUI KDE 3.5)

[Jeronimo Calvo]

Hi Folks!!

I did compile VirtualBox, and followed the instructions under

http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/virtualization-host.html

But I am getting following error when launched from the terminal:

> # VirtualBox
> No protocol specified
> Failed to open the X11 display!

When used the Icon created on System>VirtualBox (Using KDE 3.5)

Using uname -a:

> FreeBSD  7.2-STABLE FreeBSD 7.2-STABLE #1: Sat Aug 29 15:04:29 UTC 2009     root@:/usr/obj/usr/src/sys/GENERIC  amd64


Seems to open for few secs... and suddenly disappears...

Any ideas?