Windows Server 2012 Hyper-V Manager CAN NOT Manage Windows Server 2008 Hyper-V Host

Although Windows Server 2012 Server Manager can manage Windows Server 2008, Windows Server Hyper-V Manager could not.

I installed .Net Framwork 4.0 above.

I installed Windows Management Framework 3.0 above.

I installed KB2682011 hotfix

and I ran below commands

1. Set-ExecutionPolicy -ExecutionPolicy RemoteSigned
2. Configure-SMRemoting.ps1 -force -enable

after that, I could see the information of windows server 2008 in server manager. but just that.