me and my cousin were wanting to use are web cams and talk to each other but we couldnt on msn because i dont have win.xp so he said his wife uses yahoo to talk to people with out xp so we went to our yahoo messenger and went to use our webcams but it says :sorry, you appear to be behind a firewall and are currently unable to use the Yahoo! Webcan service. i've tried alot of things and nothing worked. there is a help screen i went to when i received that message and it said inorder to use webcam behind a fire wall you must set a port a 5100 and the host as webcam.yahoo.com but i wasn't aware i had a fire wall but i did the port thing anyway and still nothing. so i called my cable internet provider and they said that they dont block anything like that but they told me to go to my network in control panel and put in their host name and domain and ip number but that didnt help either, i need some more help.