It means you have an installation problem.

Delete your LW preferences folder whilst LW is CLOSED & is found here:
http://www.gnutellaforums.com/genera...der-vista.html
Then do these steps:
http://www.gnutellaforums.com/333278-post2.html. And btw your java is out of date.
For Vista, you need to make the installer & program
'Run as Admin' via right-clicking each.