I would still suggest trying another brand of CDR, it might help.
Even if these CDs work in another writer it is no guarantee that your writer is broken (for example, my father has a writer that refuses Princo CD-R, but has no problems whatsoever with no-names, Traxdata or Philips; some brands are just particular about the CD-R to be used).
If it is an IDE writer, check your DMA settings.
Is it with both data and audio, or only with audio or data?
First I'd suggest you try another brand of CD-R.