Cant record

Hello, 

Trying to record from my DDJ 400 on my Mac Catalina, whenever i click on the record button it starts blinking  but the minute i play the song the blinking stops and it doesnt  record

when i checked if microphone is connected rekordbox option is not there to check the box.

Also i unintalled and reinstalled but same problem occurs it just never asks me for permission to access the microphone.