The Server is unable to process the request due to internal error for MSCRM 2011

Hi ,

I am getting below error after i have reinstalled my dev instance with roll up 14. I am trying to run a console job which was working fine before. I am getting below error at highlighted line.

 public OrganizationDetailCollection DiscoverOrganizations(IDiscoveryService service)
        {
            RetrieveOrganizationsRequest orgRequest = new RetrieveOrganizationsRequest();
            RetrieveOrganizationsResponse orgResponse =
                (RetrieveOrganizationsResponse)service.Execute(orgRequest);

            return orgResponse.Details;
        }

Full Error:
The server was unable to process the request due to an internal error.  For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the <serviceDebug> configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework 3.0 SDK documentation and inspect the server trace logs.

Thanks