Problem using the UR824

Hey guys! As a beginner, I’ll try to explain my problem as simply as I can…
I just got an UR 824, but I just can’t hear what I’m playing while recording. Actually, when cubase is not opened, I can hear it, but whenever I open Cubase, it just stops. I can play and listen to what I’ve recorded, but I can’t hear anything while I’m recording.
I’ve been trying to figure it out for like 5 hours, and now I just want to set fire to it! :slight_smile:
If someone could help me, my nerves and I would really appreciate!
Thank’s a lot!