Apps :: Trouble burning cds

Unable to burn data cd's.
Worked about 6 months ago but now (after making a dozen coasters) I get this error trying to mount what I thought I had burned:
"error: mount: relocation error: undefined: blkid_unknown_fstype".

Tried with Apps/Tools/CD burn app
and also via Aterm sudo: cdrecord -v -eject speed=8 dev=0,0,0 /tmp/..filename...

cdrecord -scanbus shows cd/rw at 0,0,0

Must be doing something wrong.

Edit 11/03/07.
Just downloaded dsl3.4.5. (using dsl 3.3)
Using Aterm as sudo and:
cdrecord -v -eject speed=8 dev=0,0,0 dsl-3.4.5.iso
Created cd okay. (works on my PII with cdrom but get scsi errors when tried on my PIII with cdrw)

But still having trouble making backup of files from DSl3.3 (maybe rc2)

Apps/tools/cd burn. Options set to default.

Edit: 11/04/07. FYI.
Had only cdrw on main computer, Noticed it would not read cd it had just burned. (SCSI errors kept running had to shutdown)
CD worked on another computer that had only cdrom (not rw).
So I re-installed cdrom as master and kept cdrw as slave on main computer and now burned cd works fine..

original here.