hello i have a problem and i dont understand it with the following code in aspx File:

            <div class="widget-content">
                <igchart:UltraChart ID="UltraChart3" runat="server">
                <ClientSideEvents ClientOnMouseClick="BarChart_ClientOnMouseClick" />
                </igchart:UltraChart>
            </div>

            <div class="widget-content">
                <igchart:UltraChart ID="UltraChart4" runat="server">
                    <ClientSideEvents ClientOnMouseClick="PieChart_ClientOnMouseClick" />
                </igchart:UltraChart>
            </div>

            <div class="widget-content">
                <igchart:UltraChart ID="UltraChart1" runat="server">
                <ClientSideEvents ClientOnMouseClick="ColumnChart_ClientOnMouseClick" />
                </igchart:UltraChart>
            </div>

            <div class="widget-content">
                <igchart:UltraChart ID="UltraChart2" runat="server">
                <ClientSideEvents ClientOnMouseClick="ColumnChart_ClientOnMouseClick" />
                </igchart:UltraChart>
            </div>

and in aspx.cs File i render each Chart

            renderUltraChart.RenderPieChart(model, UltraChart4);
            renderUltraChart.RenderBarChart(model, UltraChart3);
            renderUltraChart.RenderDayColumnChart(model, UltraChart1);
            renderUltraChart.RenderColumnChart(model, UltraChart2);

and the function RenderPieChart(information model, Ultrachart chart)

private void RenderPieChart(information model, Ultrachart chart){
            chart.Data.ZeroAligned = true;
            chart.LoadPreset(preset.GetFilePath(), true);

}

the preset file ist in the Zip File.

but the Problem ist sometime in my page on the place of PieChart i am getting the ColumnChart . May be you can help me to understand this error.

Thanks