[SOLVED] cdj's 350 + Traktor pro - macbook pro + usb Hub

Hey guys I just bought my macbook pro and when I tried to connect it with cdj's 350, I had sound on 2 channels in the mixer, I imported the tsi file with the mapping  but I couldn't control traktor through the cd's (play,pause,jog etc.)..I read the solution with the usb Hubs and I think maybe should work...

I want to ask you if I buy 1 usb 2.0 hub with 4 outpouts, and connect both cd's 350 on it I will make it work or I need 2 usb hubs? I'm looking forward for your reply,

Thank you.