Hi to all engineers, Finally after working on my pc for about 3-4 hours I give up. CD-ROM and CDR are connected to same IDE bus one is master and The other one is slave. What did I check? 1. IDE itself works 2. CD-ROM can boot from any bootable CD 3. in windows 2000 says ( device is not working properly) 4. I uninstalled and reinstalled same thing 5. I always install and uninstall lots of software 6. I have service pack 3 and other recommended updates from msn any idea will appreciate Andre -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.