Emu 0404 Sending a seperate digital out

I want to reamp through my Kemper amp via SPDIF.
Obviously I need a separate output within Cubase so I don’t get the whole mix through the Kemper but cant work out how to do it via the EMU 0404.
I’ve tried using E-wire but it aint really doing it for me and I’ve spent hours trying to get it working
Has anybody succsessfully managed this?