Bugs and Problems

[Critter]

Mission1 coms issue...when I am RTB, all tasks accomplished, I am told to contact arrival, i switch to the preset, nothing, continue flying, told to contact approach, switch to preset, nothing, eventually told to contact tower, nothing, I land, told to contact ground, nothing. Basically I am not hearing any voice on the different preselects on RTB. I land and only get a 50 for the mission and a draw, when all tasks have been completed. What am I missing?  Thanks