I went to the PaloAlto manual on page 53 (Deploy Agent Settings Transparently) and I saw that is not really clear how to make the plist file but according to what I saw, your plist file looks good but that is depending on what other settings you are going to setup for the app.
Have you been able to try Fileset Magic for this Fileset creation? If you have and it hasn't worked, Could you get a computer with a good known working installation and grab the plist from there and then go to a computer with FileWave Admin and start a FileSet Magic creation?
1) Take a first snapshot.
2) Drop the known working plist into the correct location:
3) Set permissions and ownership (Matching the ones on the known good machine/installation).
4) Take second snapshot.
5) Test pushing it to a computer.