About Group Tree property of SAP Crystal report

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ASP.NET

Hi,
I am using SAP crystal report in tab container. Report display successfully on event firing but problem is that the Toggle group tree property could not be display.
Therefore, I am daily exclude this property by mine. It is wastage of time.

So I want to remove this property from my report.
So help me any one of them. The .aspx code is as follows-

<AjaxToolKit:TabPanel ID="tpHistorySearch" runat="server" HeaderText="<%$ Resources: MMSGlobalResources, tp_HistorySearch %>" Height="100%" TabIndex="1">
<contenttemplate>
<CR:CrystalReportViewer ID="crvECInspectionDetails" runat="server" AutoDataBind="True" BestFitPage="True" HasZoomFactorList="True"
Height="300px" ReportSourceID="crsECInspectionDetails" ToolPanelView="None" ToolPanelWidth="300px" Width="500px"
EnableDatabaseLogonPrompt="false" HasToggleGroupTreeButton="true" EnableDrillDown="False" />
<CR:CrystalReportSource ID="crsECInspectionDetails" runat="server">
<report filename="../Report/rptECInspectionDetails.rpt">






Please help me.