Limewire is telling me that i'm behind a firewall and its not letting me connect or do anything . The exact message is.....

Limewire is unable to connect to host on the Gnutella network. This is most often due to firewall or content-filtering software blocking access to Gnutella (port 6346). Please review your firewalls options to allow Limewire to access the Gnutella network or speak to your system administrator or ISP to determine if Gnutella traffic is being filtered.

I was able to download whatever I wanted before but then it just went weird like one day. I reformatted my computer incase something icky decided to install itself and since I wiped every thing I've downloaded 4 things.

Msn Messenger 7.0
Azureus
Java JRE (1.5)
Limewire
Goggle toolbar

I don't have any firewalls at all on my computer now and it's doing the same thing as before. When I test port 6881 on azureus it also tells me i have a Nat error. Please somebody help ?