Dúvida Instalar BackTrack 4 R2 ?

[nOx]

Ola galera baxei o BackTrack 4 e tentei rodar no virtual pc,mais quando do o comaando startx aparece o seguinte erro !

root@bt:~# startx

X: warning; process set to priority -1 instead of request priority 0

X.Org X Server 1.4.0.90
Release Date: 5 September 2007
X Protocol Version 11, Revision 0
Build Operating System: Linux Ubuntu (xorg-server 2:1.4.1~git20080131-1ubuntu9.2)
Current Operating System: Linux bt 2.6.24-16-server #1 SMP Thu Apr 10 13:58:00 UTC 2008 i686
Build Date: 13 June 2008 01:08:21AM
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Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue Feb 3 17:13:36 2009
(==) Using config file: "/etc/X11/xorg.conf"

Fatal server error:

AddScreen/ScreenInit failed for driver 0

xinit: Connection reset by peer (errno 104): unable to connect to X server
xinit: No such process (errno 3): Server error.
root@servidor:~#

Me ajudem,valeu !!