In asp.net chart All columns bottom text not showing

            DataSet ds = sql.getds("select task.task_title,task_performance.totalpoints,convert(varchar(20),date,113) as date from task_performance join task on task.task_id=task_performance.task_id where user_id='" + Session["iduser"].ToString() + "' and  task_performance.date between '" + lbldate.Text + "' and '" + DateTime.Now.ToString("dd-MMMM-yyyy") + "' order by task_performance_id desc");
            int rowcount = ds.Tables[0].Rows.Count;
            if (rowcount == 0)
            {
                lblperformance.Visible = true;
                lblperformance.Text = "No Task Performance Found";
            }
            else
            {
                Chart1.Series.Clear();
                lbltitle.Text = "";
                for (int i = 0; i < rowcount; i++)
                {
                    string title = ds.Tables[0].Rows[i][0].ToString();
                    String totalpoint = (ds.Tables[0].Rows[i][1]).ToString();

                    if (totalpoint == "")
                    {
                        totalpoint = "0";
                    }
                   
                    Series series = new Series();
                    series.IsValueShownAsLabel = true;
                    series.LegendText = title +  "    (" + ds.Tables[0].Rows[i][2].ToString()+")";
                    Chart1.Series.Add(series);
                    Chart1.Series[i].Points.AddXY(   "Task", totalpoint);
                    Chart1.Series[i].ToolTip = title + ", Date :" + ds.Tables[0].Rows[i][2].ToString();

                    //lbltitle.Text += (i + 1) + "." + title + "<br>";
                    Chart1.ChartAreas["ChartArea1"].AxisX.MajorGrid.LineWidth = 0;
                    // Chart1.ChartAreas["ChartArea1"].AxisY.MajorGrid.LineWidth = 0;

                    Chart1.ChartAreas["ChartArea1"].AxisY.MajorGrid.LineColor = Color.Gray;
                    Chart1.ChartAreas["ChartArea1"].AxisX.LineColor = Color.Gray;
                    Chart1.ChartAreas["ChartArea1"].AxisY.LineColor = Color.Gray;
                }
            }

                  <asp:Chart ID="Chart1" CssClass="chart-legend" runat="server" Width="932px">
                      <Series>
                          <asp:Series Name="Tasks" YValuesPerPoint="6" ChartType="Column"  CustomProperties="LabelStyle=Top" YValueType="Int32" IsValueShownAsLabel="true" >
                                <EmptyPointStyle IsValueShownAsLabel="false" IsVisibleInLegend="false" /></asp:Series>
                      </Series>
                      <ChartAreas>
                          <asp:ChartArea Name="ChartArea1" ></asp:ChartArea>
                      </ChartAreas>
                      <Legends>
                            <asp:Legend Name="Task point"  Alignment="Center" Docking="Right">
                            </asp:Legend>
                       </Legends>
                  </asp:Chart>