The file recorded by WebEX player, plugged in the headphones, there is no sound, but the computer comes with the audio device has sound, headphones have been confirmed to be good, how to solve?

WEBEX under win?7 needs to disable the external audio device to be able to use headphones

Restore the external impression if you right-click on the panel, select Show Disabled Devices, a gray device appears, right-click and select Enable.