I have a ADSL/ethernet broardband 256k connection with a link speed of 100Mbps, my average individual limewire download speed is 1 - 10 KB/s with usually more than 2 hosts, and evey 10 or so minutes it will spike to between 100, 200, or even 300 KB/s, I want to know how I can keep my download speeds at 300 KB/s.
I have tried turning off my firewall, and my antivirus (avast) I have added the limewire port to my firewall settings.

I have a D-LINK dsl-302g generation 2 modem

I would really appreciate the help thx!!

NOTE: When I download anything straight of the internet they download at an average of 30KB/s each