Cannot play finalized discs on Panasonic dmr-ex-48v (Sony RDR-VX530)

[qanda]This question is published in the hardware section for the Sony RDR-VX530. Click here to view full specs.[/qanda]I had problems with the Sony, so a friend let me use his Panasonic and not one of the 150 discs finalized of the Sony will play. Says nothing recorded. Anyone else have similiar Problem? Thanks