MS Chart Control -Line Chart Problem

Hi,

I try to draw a line chart with the microsoft charting control (.net 3.5), but the line always closes on itself. I couldn't find why.

Chart1.Series("Series1").ChartType = DataVisualization.Charting.SeriesChartType.Line
Chart1.Series("Series1").Points.AddXY(New Date(2010, 1, 2), 10)
Chart1.Series("Series1").Points.AddXY(New Date(2010, 1, 5), 20)
Chart1.Series("Series1").Points.AddXY(New Date(2010, 1, 6), 50)

<asp:Chart ID="Chart1" runat="server" Palette="BrightPastel" BackColor="#FFFFFF"
                                    ImageType="Png" ImageLocation="~/TempImages/ChartPic_#SEQ(300,3)" Width="800px"
                                    Height="500px" BorderDashStyle="Solid" BackGradientStyle="TopBottom" BorderWidth="1"
                                    BorderColor="181, 64, 1" BorderSkin-SkinStyle="None">
                                    <Legends>
                                        <asp:Legend Enabled="True" IsTextAutoFit="True" Name="Default" BackColor="Transparent"
                                            Font="Trebuchet MS, 10px, style=Bold">
                                        </asp:Legend>
                                    </Legends>
                                    <BorderSkin SkinStyle="Emboss"></BorderSkin>
                                    <Series>
                                        <asp:Series MarkerSize="5" BorderWidth="1" XValueType="DateTime" Name="Series1" ChartType="Line"
                                            MarkerStyle="Circle" ShadowColor="Black" BorderColor="180, 26, 59, 105" Color="220, 65, 140, 240"
                                            ShadowOffset="2" YValueType="Double">
                                        </asp:Series>
                                    </Series>
                                    <ChartAreas>
                                        <asp:ChartArea Name="ChartArea1" BorderColor="64, 64, 64, 64" BorderDashStyle="Solid"
                                            BackSecondaryColor="White" BackColor="OldLace" ShadowColor="Transparent" BackGradientStyle="TopBottom">
                                        </asp:ChartArea>
                                    </ChartAreas>
                                </asp:Chart>

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