Can't connect to ANY p2p -HELP PLZ

Ok... I moved to uni. We have a LAN connection. I connected everything worked fine including connectin to any p2p server. Then computer broke, had to take it home and get a new motherboard. At home we have cable... new improved computer was connected... everything worked including p2p... brought it back to residence.... internet works EVERYTHING works fine except i can't connect to ANY p2p. WHY??? It's not my firewall because it worked at home and the school doesn't have a firewall either becuase it worked for me before, and everyone else's also works here.

 

look here

www.practicallynetworked.com