Code don't display the names of months in the Axis X

Code don't display the names of months in the Axis X

Hi there, hope in your help.

Why this code don't display the names of months in the Axis X?

Can you help me?
Thanks in advance.

Chart1.ChartAreas["ChartArea1"].AxisX.MajorGrid.Enabled = false;
Chart1.ChartAreas["ChartArea1"].AxisY.MajorGrid.Enabled = false;
Chart1.ChartAreas["ChartArea1"].AxisX.IsMarginVisible = true;

Chart1.Series.Add("Series1");
Chart1.Series["Series1"].LabelFormat = "#,##";
Chart1.Series["Series1"].XValueMember = "month";
Chart1.Series["Series1"].YValueMembers = "number";

Chart1.Series["Series1"].ChartType = SeriesChartType.Spline;

Chart1.Series["Series1"].IsValueShownAsLabel = true;
Chart1.Series["Series1"].IsValueShownAsLabel = true;

Chart1.Series["Series1"]["ShowMarkerLines"] = "True";
Chart1.Series["Series1"]["ShowMarkerLines"] = "True";

Chart1.Series["Series1"].BorderWidth = 3;
Chart1.Series["Series1"].Color = Color.Red;

Chart1.DataSource = objCmd.ExecuteReader();
Chart1.DataBind();

Chart1.SaveImage(PNG, ChartImageFormat.Png);