I have 4 Kenwood TK-D340U DMR radios that I just programmed. They all communicate with each other. I am trying to get them to work with some Motorola XPR 3300 DMR radios. When I push the transmit button on either radio, the other radio's receive light shows that it is receiving the signal but no audio passes between them. I have gone over the programming for both radios and see nothing set wrong. I have correctly set the color code and time slot. Am I missing something on either radio