X and Fluxbox :: No video

Hi

When boot from CD and seems all process runs ok, but instead of pretty desktop I get a black screen.

I have other machine with chipset sis 620, and I donīt have this problem

I download the DSL 2.0RC1 on AMD 64, NForce4, XFX GeForce 6600GT.

What I can do? This is a bug? No support for GeForce6600GT?
thank's

tks, I will try!