Good day all.In order to send the ATC through a headset, I installed a Plantronics USB headset to my W7-64 Pro FSX SP2 system.I have the speakers setup for FSX output and I have V6.05 pointed at the headset.Testing VoxATC via the Voice Config page confirms that the sound is in the headset only.Testing the Voice Rec via the W7-64 Control Panl confirms that the Mic is OK.Running FSX confirms that the engine sounds are through the speakers only (audio is connected to the on-board Realtek sound).Initializing V6.05 starts off OK with each voice Testing correctly (I can hear them).After the voices test, the Initializing dots (.....) stop and nothing happens.When I disable VoxATC and unplug the USB headset, and re-initialze, it starts normally and seems happy.I've tried various combinations but the result is the same.It seems that the USB (ie. 2nd sound card) makes VoxATC unhappy.Can anyone shed some light here?ThanksNick