It looks like you installed the international version of LW, is that so? If not, update your Java: either
http://www.java.com/en/download/windows_automatic.jsp for version 1.4x OR
http://java.sun.com/j2se/1.5.0/download.jsp (take the JRE) You could perhaps try the LW 4.1.0 version also
http://www.limewire.com/english/content/beta.shtml or at the bottom of your personal dwnld page if you're a pro user. Don't install the international version. If you do install this LW 4.1.0, uninstall the previous version 1st using your Add/Remove programs control panel.
Also, have you configured your firewalls to allow LW access:
http://www.limewire.com/english/content/firewalls.shtml