How to recognize build-in iSight camera in windows vista

Hi,

I am not familiar with MAC. I want to use build-in iSight in windows vista through paralle for msn. But when I connected MSN, it is showing there is no webcam installed and I can still accept vedio can but I can only see my friend and they can not see me.

Can anyone help me to install iSight camera in windos vista through paralle step by step pls?

Thank you very much!