Can I use a preamp by ADAT with my UR824?

Hello everyone! I am a new user here on the forum and I hope someone can really help me!
I have an UR-824 card and use to record my drums through my iPad and Cubasis. Until here everything ok, it works great!
I bought a Focusrite preamp (Oxtopre MKII) that I thought I would connect to the UR-824 via ADAT to add another 8 microphone inputs. I tried to connect but Cubaseis does not detect Octopre’s 8 channels. Does anyone know if Cubaseis supports this?
Thank you so much