Behind a NAT and proprietary adsl modem

Hello everybody,
I am pleased to meet HE tunnelbroker forum, I have already try to get an answer on the other topics but unsuccessfully.
So I want to use HE tunnel.
I created a regular tunnel, I indicated my public IP.
I want to create the tunnel from my personnal computer. I have authorized the ping from my ISP adsl box (Orange) and then I have created a tunnel in my Windows:

netsh interface teredo set state disabled
netsh interface ipv6 add v6v4tunnel IP6Tunnel <my private IP> 216.66.84.42
netsh interface ipv6 add address IP6Tunnel 2001:470:xxxx::2
netsh interface ipv6 add route ::/0 IP6Tunnel 2001:470:xxxx::1

Then I tried to surf to ipv6test.google.com, unsuccessfully, I also tried to ping a public google IPv6 address : 2001:4860:8007::6a, unsuccessfully.

Is my case typical? What I miss?