I already deleted my preference folder, and loading limewire isn't returning it. Anything I can do? I've been

myself trying stuff to fix mine. The start-up square comes up, and I get an error message:
"LimeWire was unable to initialize and start. This is usually due to a firewall program blocking LimeWire access to the internet or loop-back connections in the local machine. Please allow LimeWire access to the internet and restart LimeWire."