My dad and I are trying to do some audio chatting with two ethernet connected computers. I have an iSight camera on top of my LCD monitor... and my mom's older iMac has a built in microphone we're attempting to utilize. But every time when I try or my dad on the iMac tries to start a two way audio chat, it doesn't work. Every time! Darn. This stinks as you can imagine. Any ideas on what to do? Thanks for any help!