AC3 plays on DVD SP, not on DVD player

I encoded an entire movie and trailer using maestro and took that m2v and ac3 file over to DVD SP. In simulation mode there were no issues with playback. The audio/video played properly. However, when we burned the disc to DVD, the audio wouldn't playback on the trailer only. The movie audio was fine.
I then digitized the trailer into FCP and compressed an ac3 file from that quicktime. The audio played correctly in DVD SP and every DVD player I tested.
I checked the audio settings of both ac3 files and their identical.
Bit: 192,000
Sample Rate: 48,000
Sample Size: 16
Ch -2
Does anyone have any explanation as to how this could occur? Are there any ac3 testing programs that could check the files for errors?

So I've run a few tests and I've found that the trailer m2v and ac3 file that I imported from maestro (the one that won't play audio on dvd players)...if I put it alone on its own track and then build/format that then the audio plays on a standalone dvd player. This makes sense since the movie I encoded worked correctly because it was isolated on its own track.
Originally, I had the maestro trailer ac3 and a blank audio ac3 from FCP sharing the same track. Once I digitized the trailer from FCP and compressed it using compressor...the track played the audio on dvd players.
Apparently, DVD SP doesn't like ac3 files that have been compressed using different compression software...even though the bit/sample are identical. Does anyone else have any other explanations?

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Message was edited by: jbrianrich

"....and you still haven't converted your audio to Dolby2 as I've suggested since my first post."
YES It was converted in compressor to a Dolby/ac3 file this morning when i mentioned it in my last post .."that I re-compressed it again as a "Best Quality 90...." and said that it fixed about 95% of the jerkiness..."
And since your first post i've only been at the project since this morning...not last night.and it was the first thing i tackled (and tried) when i got in ..When I posted the issue i was at home and not at the office, so Iwas not able to try anything until this morning
So let me re-explain what I have done to the file since 7:30 this AM..
I re-sent it to compressor, compressed at Best 90/Dolby ->AC3....I then opened DVDsp...I dragged both files...(the Mpeg file and the AC3 to the DVDsp window...Simulated and burned..I burn two copies. one for me, one for the client...we use two different DVD players. He says its still a lil jerky...I reply saying yes I saw it on my disc as well.
SO with being said and the file IS currently a dolby AC3...why would it still be jerky?
Would it have anything to do with footage being ripped from another disc?
I really appreciate the help you offering but it sounds like you are being condescending trough your answers and making it seem as though i am not doing what you suggest.
Message was edited by: jbrianrich

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