In the 'Song Play' mode/screen, Page 0, there is the word 'file' just below the top left corner of the screen. Next to it is the actual file name (this part actually points to the file on disk). And to the right of that is the name of the file (I know it sounds confusing but that's how the Triton is).
In my situation the file name to the right is blank, but to the left the actual filename is there (the name of the file should be on the left and right). When I press play the Triton actually freezes up and then i have to turn power off and back on to reset it. But peep this, when i load a midi file from protools it plays and everything works.
This is how i've been doing it: I make a song in protools via midi, playing the Triton. I save the midi file and load it in the Triton. And it plays.
On the other hand I made a song in fruity loops using all the fruity loops instruments. I save the file as midi and load it up in the triton and it doesn't play.