Do a speed test & tell us your speed
http://www.dslreports.com/speedtest?more=1

Download a file from here & see what speed you get
http://www.magnetmix.com/video.shtml

How many green connection bars do you see?
Do you see the firewall icon (brick wall in front of the blue globe)?
Have you tried other p2p apps & if so, do you still see slow speeds?

Has New Wave taken over Charter's cable internet? I can't find an AUP for New Wave but Charter do have a couple of things in their AUP regarding material that infringes copyright (including music) & also about excessive bandwidth use. We've seen a few Charter customers here with complaints about slow download speeds.
http://www.charter.com/Visitors/Policies.aspx?Policy=6

You could double check all of your settings within LW's options. You might find some tips in the thread below, too
Configuring LW for best performance