Drum track missing from recording

[linmix]

I have created some MIDI loops and then recorded them from a session into an arrangement...
I have selected the tracks I want to record and played it through to check I hear everything I want to record and then exported to a WAV.
When I listen to the WAV file that I export, everything is recorded except the drums!?

All other tracks were made with VSTs. The drum track is based on a drum kit from the Drums section in Ableton itself.

https://pasteboard.co/HkgroEg.jpg

What could I be doing wrong? Why aren't my drums being recorded?

[jbodango]

Your output routing is incorrect on the drum track.

Try switching from ext 1/2 to Master

[linmix]

Man I feel stupid
I'd been staring at this for over an hour before I started scouring the internet for a solution and it was staring me in the face all this time!

Thanks!!