your recorder is writing in a special format, that is different from standard DVD format.
I am not sure if that works, but worth trying:
Get ImgBurn and copy the disc to an .ISO image file onto your harddisk. Then write this iimage file onto a new blank disc. Using a rewritable disc (DVD+RW or DVD-RW) for testing isn't a bad idea here. If that works, then you can write the image onto a once-writeable disc.