Data is repeating multiple times in crystal report?

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VB

I have used title no. as primary key.
When I am executing this code on SqlManagement Studio it displays the correct data but in Crystal report it repeats data multiple time.

This Is My Code,

Cursor = Cursors.WaitCursor;
              timer1.Enabled = true;
              RptAccSubject rpt = new RptAccSubject();
              frmr_AccSub frm = new frmr_AccSub();
              //The report you created.
              SqlConnection myConnection = default(SqlConnection);
              SqlCommand MyCommand = new SqlCommand();
              SqlDataAdapter myDA = new SqlDataAdapter();
              lib_dbDataSet myDS = new lib_dbDataSet();
              //The DataSet you created.

              myConnection = new SqlConnection(cs);
              MyCommand.Connection = myConnection;

              MyCommand.CommandText = "Select B.TittleName,B.ClassNo,B.Author1,B.NameOfPublsher,B.Subject,I.TotalPages,I.VenderSource,I.OrderNo,I.OrderDate,I.InvoiceBillNo,I.InvoiceBillDt,I.PriceInRs,I.PurPrice,I.Remark,A.AccNo From BookTittle B FULL OUTER JOIN Invoice I on B.TittleNo=I.TittleNo JOIN AccessionRegister A on B.TittleNo=A.TittleNo where A.AccNo between @d1 and @d2 and A.SeriesCode = '" + cmbSeriesCode.Text + "' ";
              MyCommand.Parameters.Add("@d1", SqlDbType.Int, 30, "AccNo").Value = textFromAccNo.Text;
              MyCommand.Parameters.Add("@d2", SqlDbType.Int, 30, "AccNo").Value = textToAccNo.Text;
              MyCommand.CommandType = CommandType.Text;
              myDA.SelectCommand = MyCommand;
              myDA.Fill(myDS, "BookTittle");
              myDA.Fill(myDS, "AccessionRegister");
              myDA.Fill(myDS, "Invoice");

              rpt.SetDataSource(myDS);

              frm.crystalReportViewer1.ReportSource = rpt;
              frm.Show();