You can try to connect the controller to another computer/laptop to see if it has the same problems. If it works then the problem is your computer.
You can also try to change the USB cable. Sometimes, there's a problem with it. Use the one that comes with the keylab and not some other cable. Some USB cables are only used to charge a device and don't have any communication pins. In other cases, one of the pins may not be making contact for some reason. If you were using the USB that came with the controller, try another USB cable.