SP2 has a limit to open ports/cooncetions at the same time!
Microsoft said that they did this because of the viruses (They said that many virus search at your friends list in outlook and send a copy to them.They want able to do this with SP2)
But ofcourse the true reason isn't this.They just found another weapon against piracy (peer to peer connections)
Anyway ,you can find a small "patch" solving this problem in the internet.Actually it isn't a patch.It is just the port file from windows XP service pach 1.I don't remember the name
