Shoutbox

Hiya people,
If anyone can help me with this, i'd be ever so grateful!

I bought a webcam the other day but it won't seem to work with msn, when I go into the cam settings it says: You cannot change your camera setting because either your camera is not plugged in or you are using it in a video conversation with another program.
I can see myself in the Audio/Video tuning wizard but not when I go into webcam settings (It then says more or less the same as above)

I have no idea why, please could you help me.
Much appreciated!!