chazhrt

I have a 2009 cl63. I have the dongle to receive calls. I have the tune2air to play Bluetooth music via my phone. When I answer or make calls, I can hear the other person, but they cannot hear me. There is a popping sound behind me. After the call is over I have to turn the audio off and then back on in order to hear the music again. Any help is appreciated if you have the solution.