I used to have a good quality connection but now its poor! It show only one green bar. I think it may have something to do with an error window that pops up everytime I open Limewire. It says...

"Limewire was unable to set up a port to listen for incoming connections. Some features of Limewire may not work as expected"

Help! What do i do to regain a good quality connection because currently I can't download!