Newbee question.

Ive had limewire forever and it always worked fine. I recently reformatted my hard drive and redownloaded Limewire but now it gives me a stupid message that says:

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

And yes.....its not working well. Download time is pathetic.
How do I fix this???
Thanks everyone.