The exact sme thing is happening to me. I have meticulously followed the directions. I get:
Details:
my remastered cd boots to the prompt and then displays the following message:

The graphical subsystem could not be started
or terminated unexpectedly.
Maybe your graphics adapter or monitor are not auto-configurable.

Please try to reboot and give some of the Knoppix-Cheatcodes
at the initial boot:-prompt, which match your graphics adapter.
Examples:
knoppix xmodule=radeon (or ati, nv, cirrus, ...)
knoppix xmodule=fbdev
knoppix xmodule=vesa
knoppix hsync=90 vsync=75

and if i startx manually it tells me something about "suspicious ownership root:root"

Any help..please?