All other aspects of Vpilot are working. I can hear ATC on all freqs. RX lights up with ATC transmitting. The tx & Rx boxes are white in color & the freq number is blue. When PTT button on yoke the Tx light does not change color. In audio the #1 yoke is set to PTT button. Use to be able to use Vpilot before my hard drive crashed. FSX works normally otherwise.