DJM 900 NXS dvs setup error

Hi,

I am currently trying to figure out how to connect my DJM-900 NXS to my two reloop 7000 record players via rekordbox DVS. When I play normal records through the phono output, the mixer works just fine and music comes through the channels, but when i want to use DVS and calibrate it, it doesnt even recognize anything, see pic,and it says"error!".

also, it says "audio unavailable"

here is also the rest of my setup: