Ah Alas, I think Ive found a fix!!!! I went to the Microsoft/help web site, they had a whole thing on losing UDP/TCP etc, there is a command that may help.
Go to your dos C: prompt, type: netsh winsock reset catalog
Now this is ONLY for windows XP sevice pack 2, if your running a different system this command wont work!!
If I helped in anyway, glad to, if not.... keep up the search!!