Sorry for the delay in responding. I have done some more testing and once the drive worked with a commercial DVD and one time it didn't. As mentioned in this post, my home grown DVD may not be closed, so that might be why it couldn't be read. I couldn't seem to find a way to close it manually, so I have a small file that I can rewrite to the drive and then close it.
AS was also mentioned, if worse comes to worse, I could replace the drive. Thanks to everyone who responded.