This feature cannot be used because the default provider type could not be determined to check whether it is a trusted provider. ...

This feature cannot be used because the default provider type could not be determined to check whether it is a trusted provider. 
    
You can use this feature only when the default provider is a trusted provider. If you are a server administrator, you can make a provider a trusted provider by adding the provider type to the trusted providers list in the Administration.config file. The provider has to be strongly typed and added to the GAC (Global Assembly Cache).