I bought the Traktor Kontrol S4 Mk2 from guitar center. I didn't knowthat I need a serial number product to register the used gear dj controller. The problem I'm having right now that not able connect to the software Traktor pro 4 and virtual dj and other dj software to the computer. The good new that the Dj controller does work and light flash in 2 sec, and yet no power to the dj controller. I need help on the siutuation. I've already send out a message to native insturment company to get some tech help.