Claims user authentication for Enterprise portal !!!

Hi guys,

I am trying to create claims user authentication for Enterprise portal.I have followed the below link :

http://blog.rahulsharma.in/2012/05/claims-based-flexible-authentication-in.html

By this,i can create up to point 4 of Create claims-aware Enterprise Portal site: section. When I am trying point 5(execute the New-AXClaimsAwareEnterprisePortalServer cmdlet),I am getting an error in the cmdlet “The server is unavailable”.

Please help me to get out of it issue and give some solutions for the same.

Thanks,

jagadis