Good link Shellie.
Sometimes there can be a conflict of programs. For instance…if you have Roxio installed…the two will sometimes fight each other tooth and nail.
Not knowing what other proggies you have that may interfere you may want to uninstall, use the Nero cleaning tool, run Ccleaner to clean up the registry, reboot and reinstall a clean version of Nero 7.
Or…if a burn engine is all your after…uninstall Nero and go ImgBurn.