You're not alone!. See this useful tidbit that worked for me:

>Install back door.!
>I had the same problem as you guys.
>Go to
>http://java.sun.com/j2se/1.3/jre/
>and download the installer for the java2 runtime.
>run it, and after try the LimeWire Installer.
>I work perfectly after.!
>
>Cheers.!
>
>WingsWEB