I just got a Garmin Edge 1030, and have newer Ultegra Di2 with the buttons on the hoods. I was excited to see that the Garmin can connect to Di2. When I look for it in the sensors, it is not coming up. Do I need to add an ANT+ transmitter to my current Di2 setup? I am not sure, or is that something that should already be installed and the problem is else where?