Jeff, nothing I tryed worked. Thank you for all the suggestions. I appreciate your help. I believe there must be some kind of a conflict with creating a file in FCPX on one MacPro (Mid 2010) with OS Mojave, then exporting it to an older MacPro (1,1 2006) with a much older OS (10.6.8) to burn the video with DVDSP, which, as you know is a part of a much older version of FCP suite. Apple is good at making older versions of their programs useless with upgrades. I understand that when a new OS comes out in November of this year, all of our 32bit software will have to be replaced with 64bit in order for it to work. That may be a good thing!!!!
Bottom line, I’m burning the DVD’s now with the authoring program provided with FCPX, which, in my opinion, is far inferior to DVDSP. Such is life. You have to life with some things you don’t like.
W Coles