Question regarding Cross

I am using mixvibes Cross along with stanton st 150's and beringher's djx900 usb mixer
Cross DJ DVS reconizes my mixer but not the turn tables. ( I do have the MV Vinyl)
I have no input signal
I am not sure how to resolve this problem
Cross DJ DVS reconizes my mixer but not the turn tables. ( I do have the MV Vinyl)
I have no input signal
I am not sure how to resolve this problem