GUI Environment won't start

[silentpain]

Hey guys,

i am a new member of the community and i need you help (What else?^^)

I have installed BackTrack5 on my HDD. When I boot my computer, I enter my username (root) and the password.
Then I want to start the GUI Environment, so I type the command startx. But then I have only a black screen.
My TV says that there is no connection (cable = HDMI).
Is it a problem with the HDMI-Cabel or is there something other wrong? When I boot the LiveCD everything works. :S

Greetings,
silentpain

[alooo]

TRY #useradd <username>
#passwd <password>
Type new Unix password :
#su - <password>
#start-x
/*this is because the root superuser has no GUI environment */

[silentpain]

UPDATE: I tryed to install BT5 with KDE. But I have the same problem. When I type startx my TV says that there is no connection. I will go now to bux a VGA-Cable to try it this way....

silentpain