I recently purchased the Edge 530 sensor bundle and am trying to pair the cadence sensor with it but it is not connecting. The 530 unit recognizes the sensor is there, but when I turn the cranks, it does not wake up or sense the sensor. I also do not see the LED light the instructions refer to. I changed the battery and get the same no response. I told the unit to forget the sensor and then added it back, but the same thing happens where it tries to find it, but gets no input. Do I have a bad sensor that I need to return? Everything went fine with the speed and heart rate sensors.