xsession start problem. (newbie)

Ive read a lot, and i dont find an answer (or i dont unserstand info) :oops:
i know nothing about linux, i wanted to take a look without installing it, so... i downloaded a k3.4 cd and burned it.
when its booting everything seems fine, but when iniciatin xwindows it stops.
i copy the error text.
Executing /etc/init.d/xsession start.
... (some
.. text
. here)
Starting X11
X-Window session terminated with errors
Please check and retry 'etc/init.d/xsession start'
well. what now? what can be the problem???
may i download or burn a cd again?
is there something i can write to solve it?

i dont have any other pc to test the cd, but soon ill try with a friend's
till then, any idea?
thanks,

and sorry if its the wrong place or if theres an answer somewhere else,
just tell me

One thing you can do is to see of the cd image is correct. Type 'knoppix testcd' in the bootscreen before giving enter (wil take a view minutes).

well... i did what you said,
and and the cd failed the check :(

so the problem was the copy.
Ill have to redownload it

but thanks!