Cubasis not recognising audio from external sources.

I’ve been having this issue for SO LONG now, I’m BEYOND frustration. And I’m using Steinberg’s UR12 as my interface! Cubasis 2.5, iPad 5G, iOS 11.4, and NO AUDIO from my AKG C414 mic. Tried in Garage Band and it works FINE. Problem is, I HATE GB, and use Cubasis as my main DAW. Are these interfaces made by IK Multimedia!!! and Steinberg just put their name on them!!! If so, then there’s wiring issues inside the UR12, because IK products are SO cheaply made. STEINBERG PLEASE FIX THIS PROBLEM!!!