I have the same problem, I used to download nicely with limewire and since I switched to telenet and got a router I still have all five bars light blue and no firewall but it goes at 1KB/sec

I opened the port in my router settings, I added limewire to the list of exeptions for my windows firewall and realy don't have a clue what more I can do about it..

sincerely yours
Jacco;