Percussion Playback Issue

Please see the attached score. Can anyone explain why I am not getting any signal from the channels containing Triangle or Tambourine at all? Snare and Bass are playing back fine and so is the Crash Cymbal part. I notice when I go to the Play mode and select VST and MIdi that channels 9,10 and 12 are not showing any signal at all. I tried removing Triangle and Tambourine from the Percussion 2 kit but am still getting no playback signal at all. Any logical reason why I am not hearing some Percussion Instruments?

Thank you.

Percussion Playback Issue.dorico (2.1 MB)