why don't we connect those url ?
http://www.limewire.com/pongcache/SimplePongCache.tgz
this web support some reference of how could be a pong cache ?

http://www.limewire.com/index.jsp/pingpong
this web support advanced scheme for pong caching

when i use these two url ,they all connect to the web:
http://www.limewire.com/english/content/download.shtml

why does this happen??