[CHANFL!P]

I just bought the philips video chat camera and im trying to figure out how to do the audio. it comes with a headset but has two plugs, but my PC only has one jack. It wont let me click "record audio", but when i plug one of them into the plug the sound from the computer (music, etc) will go into the headsets instead of come out of the computer. What do i do to fix this? I want to be able to hear the other person!