Do a speed test for us & post the results
http://www.dslreports.com/speedtest?more=1

Have you tried any other p2p apps & if so, do you see the same slow download speeds?
Charter have a section in their Acceptable Use Policy where they say they'll adjust a customer's account if they seem to be using an excessive amount of bandwidth...could that apply to you?
http://www.chartercom.com/site/polic...entialAUP.aspx

Delete LW's preferences folder when LW,s closed...see if that makes any difference. Points 2 & 3 in the thread below
Fixes for LimeWire

Is yours an internal modem? Do you connect to any external device?