I have always had a wired connection, I just moved and had to purchase a router and adapter. I get an excellent connection, and I can download of other sites like the steam network at over 300kbs. However, Limewire has become exceedingly slow since I hooked up the router. It still connects, I can still search, and I can still download, but the overall speed has gone from about 400kbs to 20kbs. These are always torrent files.

I am running windows XP SP3 and limewire 5.3.6.
Its a cable internet connection run through a Linksys WRT610N router to a Linksys WMP600N adapter on a 5ghz band.

I'm thinking its not port forwarding because I can still connect right? What else could it be??