Stealth means that the ports can't be tested properly because you have firewalls up preventing them being tested properly. Temporarily disable your firewall to do the test. And also configure your firewalls to allow LW full access: http://www.limewire.com/english/content/firewalls.shtml

You have the opportunity to try the free version of lw before you buy pro so ... don't throw that at us. And this is a forum not a part of LW.