Error (2916) -VMM is unable to complete the request.

Hi,

Host- windows server 2008 R2

VMM- Scvmm 2012 SP1

I have added the host successfully and created many VMs and placed on this host, but now the host is in "needs attention " status

The following error was thrown while refreshing the host:

Error (2916)
VMM is unable to complete the request. The connection to the agent "hostname"was lost

WinRM: URL: [http://hostname:5985], Verb: [INVOKE], Method: [GetDiscoveredPortAttributes], Resource: [http://schemas.microsoft.com/wbem/wsman/1/wmi/root/wmi/MSFC_HBAAdapterMethods?InstanceName=PCI\VEN_1054&DEV_3020&SUBSYS_30241054&REV_00\4&6a62e8d&0&001B_0]

Unknown error (0x80338126)

I checked the winrm service ,its fine working and there is is no issue with the firewall also

Any solution to this issue....

Thanks,

kalai