maybe some antivirus or something is blocking it?
Hahahahahahaaah u r funny xD 
What is funny? Some AV-s have security options on by default for auto block internet connection if it's over the average usage on some time (on windows 7). Some antimalware apps discconnect internet on 1 milisecond if they detect weird stuff on some ports, they close all ports (including wc3 port) and "refresh" all connections. So don't laugh if some1 doesn't know that stuff or at least be silent if u don't know how to help him. Like your laugh is usefull...
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