Try LOTR's tips here
http://www.gnutellaforums.com/286998-post2.html

To disable ultrapeer capabilities (tools > options > performance, or in earlier versions of LW tools > options > speed).

This Java version has been very reliable, download the JRE offline installer & remove any other Java versions before you install this one.
Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11

Or, if you want to try the latest update (same deal with downloading the offline installer & removing other versions before installing). If you have trouble with this version, go back to the 5.0 update 11
Java SE Downloads