"socket" addon still not being detected

I'm still trying this (from IoGuide.html)

whois := method(host,
    socket := Socket clone 
		setHost("rs.internic.net") setPort(43) 
    socket connect streamWrite(host, "\n")
    while(socket streamReadNextChunk, nil)
    return socket readBuffer
)

whois iolanguage.com

I keep getting:

  Exception: Socket does not respond to 'socket'
  ---------
  Socket socket                        Command Line 1
  Object whois                         Command Line 1

Is there away to determine if the addons are installed? Any other
ideas? TIA ...

--
Duke