IPV6 cannot ping an external address despite all is working

Hi
I encountered some difficulties to configure IpV6 with Hurricane(tunnelbroker).
I’m newbie so I apologize in advance for my poor questions. I’m tried to configure my local network with ipv6 and ipv4 (dual stack).
Ipv4 Work perfectly.

Ipv6: something is wrong in my configuration because I can’t ping an external address from my laptop but I can surf on webSite in IPv6.

When I test my config with http://test-ipv6.com/
my readiness score is 10/10

Test with IPv4 DNS record	 	ok (0.330s) using ipv4
Test with IPv6 DNS record	 	ok (0.192s) using ipv6
Test with Dual Stack DNS record	 	ok (0.354s) using ipv6
Test for Dual Stack DNS and large packet	 	ok (0.372s) using ipv6
Test IPv4 without DNS	 	ok (0.343s) using ipv4
Test IPv6 without DNS	 	ok (0.358s) using ipv6
Test IPv6 large packet	 	ok (0.195s) using ipv6
Test if your ISP's DNS server uses IPv6	 	ok (0.355s) using ipv6
Find IPv4 Service Provider	 	ok (0.347s) using ipv4 ASN 12392
Find IPv6 Service Provider

I can ping ipv6.google.com from router

[lli@MikroTik] > ping 2a00:1450:4013:c01::63
HOST                                     SIZE TTL TIME  STATUS
2a00:1450:4013:c01::63                     56  58 22ms  echo reply
2a00:1450:4013:c01::63                     56  58 23ms  echo reply
2a00:1450:4013:c01::63                     56  58 23ms  echo reply
2a00:1450:4013:c01::63                     56  58 26ms  echo reply
2a00:1450:4013:c01::63                     56  58 21ms  echo reply
2a00:1450:4013:c01::63                     56  58 22ms  echo reply
2a00:1450:4013:c01::63                     56  58 21ms  echo reply
    sent=7 received=7 packet-loss=0% min-rtt=21ms avg-rtt=22ms max-rtt=26ms

but no from my pc

C:\Users\Utilisateur>ping 2a00:1450:4013:c01::63

Envoi d'une requête 'Ping'  2a00:1450:4013:c01::63 avec 32 octets de données :
Délai d'attente de la demande dépassé.
Délai d'attente de la demande dépassé.
Délai d'attente de la demande dépassé.
Délai d'attente de la demande dépassé.
Statistiques Ping pour 2a00:1450:4013:c01::63:
    Paquets : envoyés = 4, reçus = 0, perdus = 4 (perte 100%),

From my pc I can ping the both router’s address.

C:\Users\Utilisateur>ping 2001:470:1f14:103c::2

Envoi d'une requête 'Ping'  2001:470:1f14:103c::2 avec 32 octets de données :
Réponse de 2001:470:1f14:103c::2 : temps<1ms
Réponse de 2001:470:1f14:103c::2 : temps<1ms
Réponse de 2001:470:1f14:103c::2 : temps<1ms
Réponse de 2001:470:1f14:103c::2 : temps<1ms

Statistiques Ping pour 2001:470:1f14:103c::2:
    Paquets : envoyés = 4, reçus = 4, perdus = 0 (perte 0%),
Durée approximative des boucles en millisecondes :
    Minimum = 0ms, Maximum = 0ms, Moyenne = 0ms

C:\Users\Utilisateur>


And 


C:\Users\Utilisateur>ping 2001:470:7c81:1::1

Envoi d'une requête 'Ping'  2001:470:7c81:1::1 avec 32 octets de données :
Réponse de 2001:470:7c81:1::1 : temps=1 ms
Réponse de 2001:470:7c81:1::1 : temps<1ms
Réponse de 2001:470:7c81:1::1 : temps<1ms
Réponse de 2001:470:7c81:1::1 : temps<1ms

Statistiques Ping pour 2001:470:7c81:1::1:
    Paquets : envoyés = 4, reçus = 4, perdus = 0 (perte 0%),
Durée approximative des boucles en millisecondes :
    Minimum = 0ms, Maximum = 1ms, Moyenne = 0ms

C:\Users\Utilisateur>

My configuration
On windows 7 and 8. IpV4 and ipV6 is fully automatic
Hurricane


Tunnel ID: 215460Delete Tunnel
Creation Date:Jul 31, 2013
IPv6 Tunnel Endpoints
Server IPv4 Address:216.66.84.46
Server IPv6 Address:2001:470:1f14:103c::1/64
Client IPv4 Address:85.27.7.52
Client IPv6 Address:2001:470:1f14:103c::2/64
Routed IPv6 Prefixes
Routed /64:2001:470:1f15:103c::/64
Routed /48:2001:470:7c81::/48 [X]
Available DNS Resolvers
Anycasted IPv6 Caching Nameserver:2001:470:20::2
Anycasted IPv4 Caching Nameserver:74.82.42.42

My router RB2011 V6.1

On the router 
# aug/01/2013 16:08:42 by RouterOS 6.1
# software id = 513R-AMAQ
#
/ipv6 address
add address=2001:470:1f14:103c::2 interface=sit1
add address=2001:470:7c81:1::1 interface=ether3
/ipv6 firewall filter
add chain=forward disabled=yes
add chain=input disabled=yes
add chain=output disabled=yes
add chain=input comment="Router - Allow IPv6 ICMP Traffic" protocol=icmpv6
add chain=input comment="Router - Accept established connections" \
    connection-state=established
add chain=input comment="Router - Accept related connections" \
    connection-state=related
add action=drop chain=input comment="Router - Drop invalid connections" \
    connection-state=invalid
add chain=input comment="Router- UDP" protocol=udp
add chain=input comment="Router - From our LAN" in-interface=bridge-local
add action=log chain=input comment="Router - Log everything else" log-prefix=\
    "DROP IP6 INPUT"
add action=drop chain=input comment="Router - Drop everything else"
add action=drop chain=forward comment="Lan - Drop invalid Connections" \
    connection-state=invalid
add chain=forward comment="Lan - Accept UDP" protocol=udp
add chain=forward comment="LAN - Accept ICMPv6 " protocol=icmpv6
add chain=forward comment="Lan - Accept established Connections" \
    connection-state=established
add chain=forward comment="Lan - Accept related connections" \
    connection-state=related
add chain=forward comment="Lan - From our Lan" in-interface=ether3
add action=log chain=forward comment="Lan - Log everything else" log-prefix=\
    "Log IPv6"
add action=reject chain=forward comment="Lan - Drop everything else" \
    connection-state=new in-interface=sit1
/ipv6 route
add distance=1 gateway=2001:470:1f14:103c::1
add distance=1 dst-address=2000::/3 gateway=2001:470:1f14:103c::1
[lli@MikroTik] /ipv6>

Why I cannot ping an external address despite all is working well?

Thanks in advance