Having problems syncing my Microfreak with a P9

[pkskySynth]

I am trying to sync my Microfreak with a Pocket Operator, PO-33 according to this video:

https://www.youtube.com/watch?v=SNPiljq-m6M

But when I hit play on my Microfreak in Seq mode, the PO-33 plays two beats and stops until I stop the MF and start it again and the PO-33 just plays two beats again and stops again.

What's going wrong?