Im not 100% on this but I think they put an end to FREE music downloads. I used to use Limewire for a while and all of a sudden I had no reception coming in or going out from the program so I looked it up and I found something along the lines that free downloading has been stopped.
You may want to do a little more research on www.google.com and see what you can find. I havent downloaded anything for quite some time.
I hope this helps you a little bit.