IPv6 Doesn't seem to be working!

I wanted to try the IPv6 feature on Azure External LB.

I went through some docs and saw Sean Wheeler's template @ https://azure.microsoft.com/en-us/resources/templates/201-load-balancer-ipv6-create/

went and Deployed that template... things worked fine. Until when I tried accessing the IPv6 DNS assigned for LB.

but resulted in Page cannot be displayed ( I have IIS setup for VM's default configs ).

IPv4 works fine but not Ipv6... can someone direct me to right way of troubleshooting or may be some explanation of what could have gone wrong? 

When I take a look, everything seems to be fine.

I also tried accessing the link http://ipv6-test.com/validate.php , on entering the IPv6 DNS url , it shows correct Ipv6 address but webpage still fails to load.

Thanks in advance

Hemanth L