I have created a movie in Movie Maker that lasts about 80 minutes and transfers normally to DVD Maker.  The resulting DVD will play in Media Player, but is not recognized in a two-year old Sony DVD player.  If I split the movie into two DVDs of about 40 minutes each, the DVDs are recognized and play without a problem on the DVD player.  If my understanding is correct, DVD Maker should be able to produce a playable DVD up to 150 minutes.  What am I doing wrong?