CONNECTION DJM 2000 NEXUS TO TRAKTOR

I try to connect my djm 2000 nxs to my PC (windows) and i can only connect traktor to te first fader (usb1/2). I saw reciently a video to connect djm 900 nxs to traktor, but the problem is in djm 2000 nxs we cant choose the output routing. . I think pionner must to update the firmare. I bought 2000 nxs because it was the best, and now de updates are only for 900. Could you help me please. I dont know how to connect faders 2,3 and 4 with usbs 3/4, 5/6, and 7/8 of my djm 2000 nxs to output routing of my pc. HELP!!