Only certain video files getting Published to Roamio

Context: I want to watch video files on my Roamio.



So, using Tivo Desktop (paid version), I have specified a folder on my Win7 64 PC hard drive to share videos with my Roamio.



If I go to

http://ift.tt/1eIbYG1

and choose a film, follow the links and save a trailer, I get an .mp4 file that I copy into my published folder. This is what the file specs are:





Within a minute or two, this file is available on my Roamio, I can play it, it works great.



With me so far? Ok, now if I go to

http://ift.tt/1sTXNb2

and choose a Dolby 5.1 trailer and download an .m2ts file, here's what I see:





Since I know Tivo doesn't support .m2ts, I then use kmttg to convert the .m2ts file using these default settings:





Then, I copy the resulting .mp4 file into my published folder. For reference, this is what the converted file shows:





However, and here's the problem: this converted file never appears on my Roamio. It's as if Tivo Server and my Roamio just ignore it. So, the question is, why?



Any guidance here greatly appreciated.



Thanks



--jay