Aqui está a resposta que necessita:
Like most units, the DVP-NS575P/S can play a wide variety of discs, including DVD-R/RW, DVD+R/RW, VCDs, CD-Rs, MP3 CDs, and discs with JPEG images. It fared quite well in our compatibility tests, handling two extremely difficult discs, but it couldn't deal with mixed-media discs that had photos and music on the same disc--it found only the music. Neither could it handle DVD-R/+R discs filled with MP3 files, nor could it display a file tree with music and JPEGs. Heavy file browsers would be better served by Panasonic's DVD-S47S.
Na descrição do seu DVD Player diz, que apenas reproduz CD´s de MP3, e nunca poderá usar DVD-R gravados com arquivos MP3.
Tenho aqui 2 DVD Player da Panasonic com USB que reproduzem Divx.
Posso rodar o que quiser neles que reproduz.