I install backtrack 5 on my hard disc an I have starnge issue.

firt on boot, I have black screen, don't see terminal, but i made startx to have graphique mode and i install backtrack on my hard disk.

I install it without any probleme but on firt boot i have blackscreen with startx

firt I think it's driver issue, I install ATI driver

wget http://www2.ati.com/drivers/linux/ati-driver-installer-11-5-x86.x86_64.run
sh ati-driver-installer-11-5-x86.x86_64.run
but still not working......

any suggestion about this ?