Hi all. I am a tv news photographer and had my professional resume tape mastered onto a TDK DVD-R at a local video production house. This DVD master plays fine in my Pioneer DV-414 DVD player. However, when I burn DVD-R copies of the master, those copies will not play on the same Pioneer. Yes, I am using the same brand of TDK DVD-R discs. It's not like I am trying to copy a copyrighted movie. I am making exact DVD-R copies of the master that worked, and the copies will not work. CONFUSED! I am using Nero to make the copies. By the way, the copies play fine on my PS2 and on my computer.