I need some help with a warning I am getting when I try to burn a DVD +R with Nero. It flashes a warning that says I am about to burn a multi-session write once DVD disc. Then it ask to burn anyway or cancel or burn without multi-session.; It also says the burned CD may not play on all DVD players. (FYI, I can use a DVD +RW, and I do not get this message.) The movie I am trying to burn is to MPG files that I opened in TMPGEnc DVD Author and created the DVD files. Could the two MPG files be my problem? If so, how do I merge/join these two files? What do I need to do to prevent this problem?