I set up port forwarding as suggested. For a few days I got a 5 bar connection

but during this time I only got one track to download

as I whatever I tried I kept getting the 'need more sources' message.
Also a few times tracks did start to download but I never got a speed faster than 3 kb/s.
Today I started Limewire and am back to square one, I cant connect and the message is that I have no Internet connection or the firewall is blocking connectivity. Nothing has changed and my Internet connection is fine.
Any other suggestions would be welcome, I dont understand what is going on at all.
Thanks.