Make sure your drive is not designed for DVD+R media. If you wrote succesfully to DVD+RW media, you problably should be using DVD+R media for your permanent storage.
I am using Windows XP Professional and the Sonic burning program that came with the computer. I have a DVD-RW drive. I backed up some photos onto a DVD+RW and was able to read the disk on this drive. I then backed up photos onto a DVD-R disk. When I tried to read it I get a blank screen. If I put the disk in my CD drive I can read it. What's my problem
John

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