The MOF Compiler could not connect with the WMI server

I am trying to add node2 to SQL  cluster (2008)  However, I kept running into errors with the following error message:
"The MOF Compiler could not connect with the WMI Server. This is either because of a semantic error such as an incompatibility with the existing WMI repository or an actual error such as the failure of the WMI Server to start".

I checked on the WMI services, they are started and running.renamed the WMI repository.  but nothing worked .

Any idea what settings I need to change in order to ensure a successful instalation and add node 2 to sql cluster.