Hi guys, I have decided to give Vatsim a go via squawk box. I have downloaded and followed tutorials on install etc. Squawkbox says I have connected succesfully, It shows the atc channels on the right but I tune active tower channel and nothing happens. I do not hear anything at all from atc, the bottom right says text only and when I hit the PTT button it buzzes. I have calibrated my mic and it says works fine. Any help? Thanks in advance!