Try the Beta 4.3.3:
http://www.limewire.com/english/content/beta.shtml LW 4.2.x has some bugs that are fixed in the new beta version.
Also leave LW on up to an hour to try to connect. Sometimes it can take some time. Depending on how many incomplete & shared files you have it can take a while to load those & some time thereafter to settle.
Also try this:
Force IP instructions & sample image