I have come to the conclusion that my HL-DT-ST DVDRAM GH15F DVD burner is not compatible with Imgburn and DVD Next Copy software. Tried changing the book type which is not listed on this burner etc........ Still having difficulties burning backup DVD's to play on external DVD players (ps2, older DVD players). Has anyone used the LG GSA-E60L 20x External USB 2.0 Super Multi Lightscribe Dual Layer burner or other devices that you would recommend. Thanks to all that helps.