run brasero with `brasero --debug` try to burn the cd
then when it fails exit, brasero and post the output,
as well as the output of `dmesg`
reboot if you haven't yet,
if you can, verify burning works in other OS (other linux, windows, etc)
The problem was described here : http://bbs.archlinux.org/viewtopic.php?id=57923
Thanks for help ;)
--
Keep It Simple Stupid
http://blog.ghostunix.org
ghosTM55