speakersnotwork 0 Newbie Poster

I'm having quite a challenge with my computer, it plays sounds perfectly well. Any music, any sounds clips off msn eg: "oh my god". But as soon as i go onto a video call, i cannot hear the other person. Msn shows that there is sound coming from the end. I've tried uninstalling my webcam, re-installing it. Plugging the speakers into a different jack. Has anyone had this problem and could give me a hand?