I've never heard of that before, but getting 500KB/s is awsome lol...
Try uninstalling your Java from the add/remove programs and then re-install the JRE offline version....(5th one down)
http://java.sun.com/javase/downloads/index_jdk5.jsp
Then uninstall Limewire using the uninstaller which is found in start > all programs > limewire...then re-install it using the offline installer...
http://www.limewire.com/english/cont...oadfree2.shtml
If that does not help with your problem try deleting your preference folder...
Fixes for Limewire when LW isn't operating as it should
If none of the above work could you supply these details please...
System details - help us to help you