major annoyance

[PinkFloydFM4]

I have a Dell E310 with Windows XP, with broadband internet from my university. My limewire is version 4.12.6, and the university says that they dont have routers, just mini-hubs and that they dont have firewalls of their own. In the summer at home my limewire worked fine, but once i got to school the brick wall icon comes up saying that limewire has detected a firewall. so all my downloads go like 5 Kb/s max if they have 8 sources, and everything else goes like 1 Kb/s. I went to limewire>options>advanced>firewall config> and copied the port number it showed and went on the windows firewall and opened 2 ports named Gnutella (one for TCP and one for UDP) with that port number and set the IP address to "127.0.0.1". it says that limewire has full access, but limewire still shows the firewall icon. i dont have any other firewalls besides the windows firewall. any idea why im still being firewalled?