UR22 mkII and beyerdynamics MMX300 Microphone problem

Hello,

so today the ur22mk2 arrived, currently I’m encountering an issue, the microphone is not working. I’M using a 6,3 adapter for the 3,5 mic but everything I try it does not pick up any signal. Also the current drivers for windows 10 are installed.

Hope someone can help me out here.