External Device setup

I am trying to setup my Yamaha mo8 midi keyboard to Cubase pro9. I open Cubase add instrument track and added the mo8 as device . I am using midi cables in/out from audio interface to Yamaha. I want to be able to change back select from Cubase and have it change on the mo8 so I don’t have to go back and forth but don’t work. I have routed all my in/out in vst conections and still nothing. can anyone help. thanks

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Regards :sunglasses: