Subreport with multiple datasource in crystal report

I have one main report which contains 2 sub report. 1st sub report has 2 datasource and 2nd sub report has 1 datasource. How to set datasource?

I have tried:

ReportDocument rd = new ReportDocument();
rd.Subreports[0].Database.Tables["Table1"].SetDataSource(search);
rd.Subreports[0].Database.Tables["Table2"].SetDataSource(sedationHeader);
rd.Subreports[1].SetDataSource(sedationApprover);

Exception Raised: Invalid index. (Exception from HRESULT: 0x8002000B (DISP_E_BADINDEX))