Problem with Rekordbox and the Left Fader DDj RR

I have DDj RR with Rekord Box I have Macos High SIerra 10.13.2 

My left Fader on Rekord box is always very low it doesnt respond when i move it up and down from my console fader but the right is fine. Also When i play from the right channel and i move the right fader the left fader goes down more too. I pick the mouse i raise the left channel and when i move with my hand the right fader up and down also the left channel goes down and stucks down and doesnt respond any soloutions for that?