hardware registry problems

[desperate]

i have a cd rom +cdrw which had been working fine but now
they are not operating at all .i tried reinstalling
through add hardware ,which detects the devices but has
error message "windows cannot start this hardware device
because its configuration information (in the registry) is
incomplete or damaged.(code 19)",please help

 

[Joseph Conway [MSFT]]

320553 CD-ROM Drive or DVD-ROM Drive Missing After You Install Windows XP
http://support.microsoft.com/?id=320553

314060 CD-ROM Access Is Missing and Messages Cite Error Code 31, Code 32,
Code
http://support.microsoft.com/?id=314060