PC won't recognize my Mixtrack Pro 3

Hi, I have a Mixtrack Pro 3, I'd been using it for a couple months with no problem, then I stopped using it for a month or two. When I plugged the controller onto my PC nothing happened, its lights would turn on, but nothing else happened, my computer won't recognize it, I reinstalled my software, changed USB cable, but nothing worked, I've even tried it with other computers, but again, its lights go on, but windows wont recognize the controller, it wont appear on the list in the Device Manager, I've tried everything that came to my mind but I've run out of ideas, please, help me.
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