I had the same problem with Limewire - extremely slow downloads. I downloaded and installed Frostwire, and my speed shot up to 100+ KBPS (right where it was beforing installing Limewire Pro). I had tried everything they suggested in this forum, but nothing worked. It seemed the answer most often given to slow speed is 'Bandwidth Shaping'. I think that is just an excuse for a problem with Limewire. Anyway, try Frostwire. It worked for me.