Crystal Reports with Stored Procedure Calling Problem

This is the code i use to call the report

Reports.rptProductPurch rptpur = new BillingSystem.Reports.rptProductPurch();
SqlCommand mycmd = new SqlCommand();
mycmd = new SqlCommand("proc_prdDetails", Program.con);
mycmd.Parameters.AddWithValue("@typeQue", 1);
mycmd.Parameters.AddWithValue("@startdate",App_Code.clsglobal.strt_date);
mycmd.Parameters.AddWithValue("@enddate",App_Code.clsglobal.lst_date);
mycmd.CommandType = CommandType.StoredProcedure;
Program.da = new SqlDataAdapter(mycmd);
Program.ds = new DataSet();
Program.da.Fill(Program.ds);
rptpur.SetDataSource(Program.ds);
CRV.ReportSource = rptpur;