dropdowntree get closed when I click on the tree

[Danar]

Hello telerik
I have Implemented a dropdowntree but when ever I click on (+) to expand the tree it get closed. it is working on other page but when I put Dropdowntree in this  Srabon responsive admin template I get the problem and the firebug showing no error.

<asp:SqlDataSource runat="server" ID="SqlDataSource2"
          ConnectionString='<%$ ConnectionStrings:POSConnectionString %>'
          SelectCommand="select category_id,category_name,parent_id from Categories_tbl;"></asp:SqlDataSource>
      <br />
      <telerik:RadDropDownTree ID="RadDropDownTree1" runat="server"  ExpandNodeOnSingleClick="True"
          DataSourceID="SqlDataSource2"
          DataFieldID="category_id"
          DataFieldParentID="parent_id"
          DataTextField="category_name"
          DataValueField="category_id"
          >
          <DropDownSettings Height="140px" />
      </telerik:RadDropDownTree>