Reply to S2 Connectivity Issue

hey guys! need your help. traktor can't detect my S2 when both s2 and traktor are already running. I had to plug my S2 first then run traktor or turn off the S2, connect it and turn it on. this is a dilemma on switching djs quickly on the same S2 unit (although I haven't tried it on other gear ). i'm trying to keep the dead air as little as possible on switching djs. so little that we can get away like it's a break of a song. is there a work around for this that you can help me with? thanks!