Sorry Andre, I'm not sure I follow. Which one isn't working? If you can boot from CD one of them at least must be working. Or did you mean that CDROM booting is enabled in the BIOS? Which CD player allows the booting? Do they work if installed one at a time as masters ? Shouldn't make a difference but have you tried them on the other IDE. In fact will one of them work as a slave(with CD jumper set as slave) off the IDE that the HDD is connected to? Does your system use Cable Select? In which case both CDROMS need to be jumpered to C/S, have you actually physically set the two drives to master/slave - if not they'll never work. If they work but 2K says they don't then I'd believe the practical rather than the the OS. Colin On Tue, 29 Apr 2003 16:27:51 -0700, Andre Abelian wrote: 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 app -- cdb, bodgy1@optusnet.com.au on 30.04.2003 I have always been a few Dendrites short of an Axon and believe me it shows. Light travels faster than sound. That's why some people appear bright until they speak! -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.