Dear Sir, I have recently acquired my new 2X DN-SC2000 midi controllers. All excited, I hooked them up to my Macbook, started my TraktorPro, imported the .tsi for 2 players, and started playing. Everything worked well. After trying all the controls, to see what they do, I kept on playing for another 20 minutes or so, until one of the controllers became unresponsive. I quit Traktor, disconnected the controllers and decided to try different USB cables. When I connected the first one (the one that still works....) the first button that lights up, is the CUE1, and flashes until all the other lights go on ...... When I connected the second one (the one that doesn't work....), it is NOT the CUE1-button that starts flashing, but the CUE3. After that, all the buttons light up, like normal. When I push DECK CHG, it changes color, when I push SHIFT+VINYL, the light under the JOG-WHEEL goes on (like normal)..... So, all in all, it seems to work fine BUT ..... ..... Traktor doen't respond to any of the controls ! I can see, however, the CTRL-light in Traktor (the one in the top of the screen, next to AUDIO and CPU and CLOCK ) respond to any control-button that I push. I went to the settings window in Traktor : Controller-Manager .... and tried to edit the simplest of the MIDI-mappings: the PLAY-PAUSE ..... I high-lighted the function, pushed ''learn'' .... and pushed the PLAY-PAUSE button on the controller..... closed the settings-window .... loaded a song in the player, with the mouse ..... and pushed PLAY. It worked ..... Does this mean that I have to manually re-program all the MIDI-Mappings for all the buttons or is there another way to fix this problem (.... firmware update or something else ... ) ?????? I have already tried this: - downloaded the .tsi from your website again and reloaded it into Traktor. - changed USB-cables (about 20 times ... eliminating faulty cables) - restored, from backup, my old Native Instruments - Folder (in Documents..) from before I first tried the controllers - changed USB-port on my MacBook - loaded the other .tsi (4 decks) - disconnected everything else from the computer except the faulty controller and nothing worked!! PLEASE HELP!!! I have a ''gig'' on wednesday, and would like to use my ''New'' controllers.... Thank you, Onno Boomstra