Windows seven Statefull DHCPv6 FAIL

Tue Mar 26 12:18:31 CET 2013

Recently I have tried to connect to my local ISP via PPPoE.
ISP gives Ipv6 addesses on PPP-link usibg Statefull DHCPv6.
Windows Seven gets an Address,  installing default gateway. Deafult gateway ping ok. But when I try to ping some internet, Windows does not send any requests.
Did any one face this problem?
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