Cannot see Hardware Status of Host ESXi 5.5 anymore in Web client 5.5.

Hello,

     I can no longer see the Hardware Status of the Host ESXi 5.5 using the web client. I can however see it under Health status using a direct connection to the host using vSphere client.

If I connect to the Vcenter server appliance using vSphere client I get No new Host data available.  This was working a while ago.

Any help is greatly appreciated.

Thanks ,

Dan