supreports error "Data retrieval failed for the subreport, 'Subreport2', located at"

I am showing 2 sub reports on a reports, one sub reports is showing fine but when i try to shown second report , it is showing below message

Error

Data retrieval failed for the subreport, 

'Subreport2', located at: . 

code: 

 string reportPath=e.ReportPath;
            SocialWorkDataset socialWorkDataset = new SocialWorkDataset();
            if (reportPath == "GoalObjective")
            {
                // e.DataSources.Add(new ReportDataSource("SocialWorkISPSpiritualGoalObjectives", "DataSet1"));

                SocialWorkDatasetTableAdapters.SocialWorkISPSpiritualGoalObjectivesTableAdapter socialWorkISPSpiritualGoalObjectivesTableAdapter = new SocialWorkDatasetTableAdapters.SocialWorkISPSpiritualGoalObjectivesTableAdapter();
                socialWorkISPSpiritualGoalObjectivesTableAdapter.ClearBeforeFill = true;
                socialWorkISPSpiritualGoalObjectivesTableAdapter.Fill(socialWorkDataset.SocialWorkISPSpiritualGoalObjectives);
                ReportDataSource reportDataSocialWorkISPSpiritualGoalObjective = new ReportDataSource();
                reportDataSocialWorkISPSpiritualGoalObjective.Name = "DataSet1";
                reportDataSocialWorkISPSpiritualGoalObjective.Value = socialWorkDataset.SocialWorkISPSpiritualGoalObjectives;
                //rptViewer.LocalReport.DataSources.Add(reportDataSocialWorkISPSpiritualGoal);
                //e.DataSources.Add(reportDataSocialWorkISPSpiritualGoalObjective);
                e.DataSources.Add(new ReportDataSource("DataSet1", (object)socialWorkDataset.SocialWorkISPSpiritualGoalObjectives));
            }

            //Interventions
            if (reportPath == "GoalInterventions")
            {
                SocialWorkDatasetTableAdapters.SocialWorkISPSpiritualGoalIntervationsTableAdapter socialWorkISPSpiritualGoalInterventionTableAdapter = new SocialWorkDatasetTableAdapters.SocialWorkISPSpiritualGoalIntervationsTableAdapter();
                socialWorkISPSpiritualGoalInterventionTableAdapter.ClearBeforeFill = true;
                socialWorkISPSpiritualGoalInterventionTableAdapter.Fill(socialWorkDataset.SocialWorkISPSpiritualGoalIntervations);
                ReportDataSource reportDataSocialWorkISPSpiritualGoalIntervention = new ReportDataSource();
                reportDataSocialWorkISPSpiritualGoalIntervention.Name = "DataSetIntervation";
                reportDataSocialWorkISPSpiritualGoalIntervention.Value = socialWorkDataset.SocialWorkISPSpiritualGoalIntervations;
                //rptViewer.LocalReport.DataSources.Add(reportDataSocialWorkISPSpiritualGoal);
                e.DataSources.Add(reportDataSocialWorkISPSpiritualGoalIntervention);
                //e.DataSources.Add(new ReportDataSource("DataSetIntervation", (object)socialWorkDataset.SocialWorkISPSpiritualGoalIntervations));
            }

Please let me know what I am doing wrong.