Unless you have access to the router/firewall of your new location, the only setting that might help is the "force IP" in prefs->Advanced->Firewall.

The previous downloads have already established a connection (HTTP), so don't need to connect to gnutella network.

Enabling the firewall settings might help: System Preferences->Sharing->Firewall->New-Gnutella/Limewire (6346)

Cheers