Perhaps because this question has been answered many times over the past 24 hours. Get LW 4.12.3 & your problem will be solved:
http://www.limewire.com/english/content/download.shtml
Did you read the forum rules before blindly posting? All forums have rules.
Forum Rules (click here) Found at the top of every section of the forums.

Sorry if that sounds hard but just making a point.
Actually I didn't see your post earlier because I was working on my computer. Those who help on the forums are all volunteers.