CD-ROM copy error

After installing an additional cd-rom, I can no longer copy files to my original cd-rom, but can still read/play files on my original drive. I receive the following message when trying to copy a file to my original drive:

"Cannot copy 'File Name.' Files on this cd-rom are read-only. You cannot copy files over to this cd-rom drive."

However, if I place the SAME disc in my new cd-rom it copies correctly (data or music). I'm running WindowsXP Home with 1GB RAM.

Thanks, hcrawfor