I suspect your hardware is NOT fully compliant, including your reader and writer. You should double check this with all pertinent hardware on your system. Try these links at HP's web site(applicable for your writer only -- you didn't specify your reader):
http://www.hp.com/cgi-bin/cposupport...09510i%20drive
OR
http://www.hp.com/cgi-bin/cposupport...09510i%20drive
If you haven't already, check out this post
http://www.mtu.com/vbulletin/showthr...p?threadid=506 , it might be of help.
If you are SURE your hardware is compliant, I would first check the firmware for an update or patch for both CD/CDR drives.