Hello there, Just swapped my old decks for an S4 Kontrol. Didn't come with any disks but I downloaded the drivers online and then installed them (with out the S4 plugged in!). I already had a version of Traktor pro 1.2.7 so I opened it in that and it doesn't seem to be coming up. I also got a X1 which seems to be coming up no trouble! What's strange is the S4 is working as a amp for my speakers so it has a few little lights on and the 'level' works at the top but it's not working as a controller and non of the turntables or controls work. I may be being stupid but I just can't get my head around it! Any help greatly appreciated. Cheers.