'unknown Error: Unable To Copy Media Directory'

I'm trying installing opensuse 10.2 using a DVD.

during installation i select The language, then Installation(or Upgrade).
1minute later i have this error:

cd:///?devices=/dev/hdb
Unknown Error: Unable to copy media
directory
to /var/tmp/TmpDir.70vjSN/MEDIA[/b]

in other attemps 70vjSN can be replace other names.

i don't know where to search for this solution. i never had opensuse before.
i guess this is some kind of bug. should i try installing using a CD instead?

(my computer[laptop] is LG P1)

edit:
some information:
found this «click»

http://www.suseforums.net/index.php?showtopic=27392

http://www.suseforums.net/index.php?showtopic=27392
[/b]

i've burned another DVD.
that's ok know.
thanks.