The extension '{0}' is not registered with WCF/WF handler. Please either remove relativeAddress '{1}' in '{2}' from configuration ...

The extension '{0}' is not registered with WCF/WF handler. Please either remove relativeAddress '{1}' in '{2}' from configuration file or register the corresponding extension '{0}' with WCF/WF handler. Please refer to 'http://msdn.microsoft.com/en-us/library/bb515343.aspx' for how to register an extension in IIS.