Slim Phatty with Logic Pro X and Axiom49

Hello!

I’m trying to connect my SP to Logic as an external MIDI instrument.

I feel like there is something I’m missing:
I have MIDI out and MIDI in of my keyboard and SP connected
I chose “New Track” and then “External MIDI” with “Use External Instrument Plug-in”
Output as “Slim Phatty - 1” and “Output 1+2”

When I make the track, one note is playing but my keyboard can’t change it and there’s nothing I can do

Can someone please help me through getting everything set up?

Thanks!