For Windows, whenever you change hardware and you are having problems, I have found the following helpful. Reboot into safe mode, go to Control Panel, Performance and Maintenance (this is with the default XP theme), System, Hardware, Device Manager. Click on DVD/CD drives and see if the old one is still listed. If so, delete it and the newer one as well. Reboot and let XP detect the new one again. Sometimes it helps to uninstall any burning software prior to the above and reinstall it after this is done.