It might be a USB power issue. I've noticed occasionally the same with my Saitek pedals. I've tried to only plug one device in a pair of USB ports in the rear of my computer, and since that wasn't possible, pairing a gaming device with something that would be off during gameplay like a printer.
A powered USB hub might help. Even if that won't solve the replugging problem, it would reduce the wear of your built-in USB ports. A USB hub is much easier to replace than a USB port on your motherboard!