[Pound Mailing List] setting up pound listeners for dual stack IPv4 and IPv6`

hello All,
I hope this list can help me.

I have had difficulty finding any references to setting up pound with 
IPv6 especially in a dual stack environment.
I already have a Heartbeat supported IPv4 Pound installation.  I have a 
listener on port 80 that redirects to the ssl version on port 443.  from 
there haproxy listens to 127.0.0.1 and load balances between IPv4 web 
servers.  I want to have the same ports on the IPv6 address do they same 
thing.  if i remove the IPv6 listeners the IPv4 work.  if I add the IPv6 
listeners i get
I think that they should look like this (actual data hidden):
/etc/pound.cfg

#pre-existing and working

#servername -IPv4 listener
ListenHTTP
     Address xxx.xxx.xxx.20
     port    80
     xhttp   2
     Service
         Redirect    "https://servername"
     End
End

#servername - ssl
ListenHTTPS
         Address xxx.xxx.xxx.20
         Port 443
         Cert "/etc/servername.pem"
         Service
                 BackEnd
                         Address 127.0.0.127
                         Port 80
                 End
         End
End

#how I think the the IPv6 should look but doesn't work

#servername -ipv6 listener
ListenHTTP
     Address yyyy:yyyy:yyyyy:yyyyy::20
     port    80
     xhttp   2
     Service
         Redirect    "https://servername"
     End
End

#servername - IPv6 -ssl
ListenHTTPS
         Address yyyy:yyyy:yyyy:yyyy::20
         Port 443
         Cert "/etc/servername.pem"
         Service
                 BackEnd
                         Address 127.0.0.127
                         Port 80
                 End
         End
End

127.0.0.127:80 is the HAproxy load balancer to the back end IPv4 web 
servers.

Any suggestions about what i am missing?
Thanks
Taz