Try this:
1. Reinstall Java using the JRE offline installer. Remove any old versions of Java before you install the new one.
http://java.sun.com/javase/downloads/index.jsp 2. Delete LW's preferences folder. See point 3 below. Make sure to show hidden files & folders.
Fixes for LimeWire 3. Reinstall LW & make sure to use the
offline installer (not the recommended one).
http://www.limewire.com/english/content/download.shtml
If that doesn't help, can you disable your download manager? Or try using another browser? I don't have a clue where cache is in Netscape! In firefox it's tools > options > privacy > private data > settings & there are options for clearing cache, cookies, browsing history etc.