Do you know if the message you received read:

"Could not find a port to use for incoming connections. Please specify a port from the configuration window."

or:

"Could not listen to socket for incoming connections; aborting."

It would also be a great help if you could send me the "limewire.props" file located in your installation directories for both LimeWire 1.4 and LimeWire 1.6. If you could send them to afisk@limepeer.com, that would be wonderful.

Thanks very much -- I know this is a bit of a pain, but just think of all of the LimeWire users out there who you'll be helping!