what kind of burner do you use? Does it also burn dvd-r media?
Many people have better luck on standalone players using DVD-r media. I am one of em. My player plays dvd+r disks, but hangs sometimes. I have no problem with dvd-r media in the same player. If you search the forum, you will find that I am not alone in this.
On the other hand, if you have the right hardware, you may be able to change the booktype on the DVD+R media to DVD-Rom before burning, and your standalone player may read it better then. Very many people have had success with this method even though I havent. Just check out the recording hardware forum for more information.