Response.redirect for MS Chart

I have a chart control.

Now the functionality i want is if the user clicks on the chart it takes it to a new page along with it i need to send a value to that page.

i tried this but the click even is not working..

   protected void Chart1_Click(object sender, ImageMapEventArgs e)
    {           
        if (Label1.Text != "1")
        {
            Response.Redirect("~/Admin/Page2Chart.aspx?node=" + Label1.Text);
        }
        else
        {
            Response.Redirect("~/Admin/Page2Chart.aspx");
        }

    }

I know we can put a URL in the Html but then i cannot put a condition in it....?

any help will be appreciated.

Thanks

<asp:Chart ID="Chart4" Height="202px" Width="360px" runat="server" 
                            onclick="Chart4_Click" >
                            <Series>

                                <asp:Series ChartType="Pie" Name="Series1" Font="Microsoft Sans Serif, 10pt" >
                                </asp:Series>
           开发者_Go百科                 </Series>
                            <ChartAreas>
                                <asp:ChartArea Name="ChartArea1">
                                </asp:ChartArea>
                            </ChartAreas>
                            <Legends>
                <asp:Legend Enabled="true" TableStyle="Tall" IsTextAutoFit="False" Name="Default" BackColor="Transparent" Font="Trebuchet MS, 8.25pt, style=Bold">
                </asp:Legend>
            </Legends>
        </asp:Chart>

Can you post the design view of the chart .

chart4.Series["seriesname"].Url = "somechartorpage.aspx?"+label1.text;              
chart4.Series["seriesname"].Points["name"].Url= "Detailedchart.aspx";