Hey folks, my friend recently picked up a MacBook and tonight my girlfriend and I wanted to show him how nifty iChat can be when it comes to video conferencing. So I started up my iChat (my girlfriend in the same room as mine with her iChat on her MacBook on as well) and got a two way conference going between my girlfriend and I, however when I went to add my friend to the video chat the little "+" sign at the bottom, iChat stated that my friend could not be added to the video conversation. Why is this happening? I have an iMac (Intel Core Duo), my girlfriend has a MacBook (Intel Core 2 Duo) and my other friend has a MacBook (Intel Core 2 Duo) as well. Obviously we all have the ability to use iChat text wise and audio wise, but not video wise.......Is there some sort of firewall thing I am not understanding or something? Any help would be great, hope to hear from someone as this is really frustrating! P.S.- I have chatted in iChat with up to four people before, thus why I am so stumped as to why this isn't working.