SimpleChat example doesn't work

Hello,

i have try to run SimpleChat.java class (provided on example) but it doesn't work... with version 3.6.2 i run two java but they doesn't 'connect' eachother..
i got this error (if i use ipv4 the error persist, it change only the fact that is an ipv4 ip)

WARNING: JGRP000034: iMac-di-Rama-78: failure sending message to /ff0e:0:0:0:0:8:8:8: java.io.IOException: No route to host

version 3.4.8 isn't affected, and two process
runned with this version connect and i can see the messages.
Also, no error is displayed on 3.4.8

just to avoid misunderstanding
1. i have read the other 'similar' message
2. i have try
java org.jgroups.tests.McastReceiverTest +
java org.jgroups.tests.McastSenderTest
and work
3. i have try to use ipv4 and jgroups.bind_addr props

what is strange is that with 3.4.8 the example work out of the box.

os: osx
java: 1.7.0_76