This code RETURNEE NULL way

ALTER proc  PrintInventoryStockTBL2 
@Store_id int,
@InventoryDate date 
 
as
  select InventoryId,InventoryName,Product_id,Product_name,Store_id,Store_name,Quantity,
RealQuantity,Inability,Increase,InventoryDate from InventoryStockTBL 
  where Store_id=@Store_id  and InventoryDate=@InventoryDate

try
            {
                Reports.Report2 reportcustomer = new Reports.Report2();
                reportcustomer.SetDatabaseLogon("pc1", "12", "Server", "MnStores", false);
                reportcustomer.SetParameterValue("@Store_id", this.txtStore_id.Text);
                reportcustomer.SetParameterValue("@InventoryDate", this.dateTimePicker1.Text);
 
                Reports.FormReport fmct = new Reports.FormReport();
                fmct.crystalReportViewer1.ReportSource = reportcustomer;
                fmct.ShowDialog();
            }
            catch { }