i've had no problems with my external dvd burner until today. i was burning extra copies of a project i finished. i made an image file in nero. when i got to the 3rd copy, i got and continue to get the message "please insert an empty disc to write to..." i've tried many discs and continue to get this message. i uninstalled the driver and restarted. that didn't change anything. anybody have any ideas? thanks for your time.