With FixedMembershipToken I get the same error message:
java.lang.IllegalArgumentException: JGRP000001: configuration error: the following properties in AUTH are not recognized: {fixed_members_value=127.0.0.2|127.0.0.1|192.168.192.64, fixed_members_seperator=|}
my config:
<AUTH
auth_class="org.jgroups.auth.FixedMembershipToken"
fixed_members_value="127.0.0.2|127.0.0.1|192.168.192.64"
fixed_members_seperator="|"
/>