I bought the memorex music CD-R and CD-RW. Guess what--none of them work in my 9000ES. This came up in a previous forum, and we concluded, but never actually tested (I would have liked to), that my CD writer was the culprit. It's an HP CD writer plus 8200 series. The person that was able to make this combination work was using the 8300 series. We were both using adaptec software (although I have Nero software and may try to experiment once more).
Other things to note: I'm using an external writer through a USB port--I write at 1X for all of these tests.