Tab Panel - why are some tracks grayed out & unselectable?

[smfritzii]

What conditions does Ample Guitar use to determine if a track can be played or not? I have a gp3 file with 15 tracks. Tracks 3,4,9,10, and 14 are not available. All other tracks are - even the drums on track 15.

I'm trying to figure out what I need to change in my tab file for the guitars to play it.

[Ample Sound]

If the track is a guitar track, it can be played in Ample Sound tab reader.