I have recorded a movie (files .IFO .BUP .VRO) on a Panasonic DVD-RAM disc 4,7 GB(non-cartridge) with Panasonic DVD video recorder DMR-E50 then I try to copy it on a DVD-RW with Ulead DVD MovieFactory 2 to play it on Samsung DVD player M105 . I can see it but I can’t listen it there’s not the audio why?!