this code doesnt work when i click results button nothing happens...where as I have a vb code to assign the value

<tr><td><asp:ScriptManager runat="server" /><asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" ><ContentTemplate><asp:Button ID="results" runat="server" Text="Results" OnClick="results_Click" autopostback="true" /></ContentTemplate></asp:UpdatePanel></td></tr>  </table>