I picked up a Faderfox Lv2 and was going to map some traktor functions to it but when I select it in the in/out ports and go to learn the function then move the button or fader nothing happens . I checked on the midi setup page and when I test it I only get a midi out signal when i check the in/out ports on the midi/usb cable , I have 2 arrows on the 1 port and 1 arrow on port 2.