I am using toast to burn a live performance of a singer and I noticed that after burning to DVD the playback repeats endlessly in the external DVD player. Where can I change this setting to play once and stop. I can't figure this out? I have a few DVD players and that happens on all of them, I thought it may have been the player but I assume now that it must be on the DVD.

This is a video DVD, right? The playback will stop at the end if you include a menu and do not activate option to play all items continuously. If you want to play all items continuously and still have the DVD stop at the end you'll need to edit the .ifo file using MyDVDEdit.