I recently purchasedB K dvds from seyberts, and none of them work. I tried two different dvd players and my computer and nothing. I contacted the seller and he said i need the new dvd player for them to work, and suggested vhs.If i wanted vhs , i would have bought vhs. Has anyone else had this problem? I don't get it, dvds from other sources and teachers work just fine, this doesn't sound right.HELP!!!!