In order to use xPilot with Audio for VATSIM, download the latest version.
If you already have xPilot installed, make sure you update to the latest version when prompted.
The first time you run xPilot, be sure to open settings and calibrate your microphone under the audio menu. When talking, the bar should be bouncing into the green band. If it does not, increase or decrease the mic volume using the slider.
Don't forget to assign a Push-to-talk key!
For xPilot to work, you must remove any other multiplayer plugins (e.g. xSquawkbox or XSwiftbus)