MainStage doesn't forward MIDI notes via MIDI Thru

Hi Community,

I am using Mainstage 3.2.1 with an external USB Audiodevice (M-Audio FastTrack Pro) on Mac OS Yosemite 10.10.5.

To control my external instruments I use an Behringer FCB 1010 MIDI Controller.

When I press a button MainStage receives a CC message AND a midi-note. I can see this in the status window of MainStage and in an application called

MIDI Monitor.

What I would like to achieve is, that MainStage forwards the midi-note to the MIDI-Out of M-Audio FastTrackPro.

When I monitor the MIDI-Out of the M-Audio FastTrack I don't see the MIDI note.

As explained the help file, MainStage should send all Notes to the MIDI OUT, if there is no Screen Control:

MainStage 3: How MainStage passes through MIDI messages

As you can see I did not configured any controllers which are capable of processing a MIDI note.

MainStage should forward the MIDI notes to the MIDI out. But it doesn't. Why?

Thanks for your help

Martin