[Zope] Listen on IPv6 interfaces?

Hello, I want zope to listen my IPv6 inteface; for some reason it doesn't. How do I make it do that? My /etc/zope has this line: ZOPE_IP_ADDRESS="" Changing it to ZOPE_IP_ADDRESS="[::]" doesn't make a difference. -- Greetings from Troels Arvin, Copenhagen, Denmark