Crystal report not showing the data in win form app..

need your help...

here is the code 

ReportDocument rptDoc = new ReportDocument();
DataSet ds = new DataSet(); // .xsd file name
DataTable dt = new DataTable();

// Just set the name of data table
dt.TableName = "DataTable1";
dt = getAllOrders(); //This function is located below this function
// ds.Tables[""].Merge(dt);
ds.Tables.Add(dt);

rptDoc.Load("d:\\CrystalReport1.rpt");

//set dataset to the report viewer.
rptDoc.SetDataSource(ds);

crystalReportViewer1.ReportSource = rptDoc;