To offer another datum point, I've had the same problem running LimeWire at work on a laptop where it screams at home using my DSL connection. I was curious to know if the slower work performance might have something to do with the firewall? Since I don't really need Limewire at work, I didn't spend much more time on the problem. However, under the advanced options, I did find an area addressing firewalls. It may be worth your time to explore those options.