asp.net - Cannot get update panel to update datalist -

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i have following code , have tried putting timer inside , outside update panel data list not update:

            contenttemplate>                  <asp:timer id="timer1" runat="server" interval="1000" ontick="timer1_tick"></asp:timer>                 <asp:datalist id="datalist3" runat="server" bordercolor="gray" borderwidth="0px" datasourceid="sqldatasource2" font-bold="false" font-italic="false" font-names="calibri light" font-overline="false" font-size="small" font-strikeout="false" font-underline="false" gridlines="horizontal" width="441px">                     <itemtemplate>                         &nbsp;<asp:label id="datelabel" runat="server" text='<%# eval("date", "{0:d}") %>' />                 <br />                         epic/sector:                         <asp:label id="epiclabel" runat="server" text='<%# eval("epic") %>' />                 <br />                         company:                         <asp:label id="companylabel" runat="server" text='<%# eval("company") %>' />                 <br />                         news:                         <asp:label id="newslabel" runat="server" text='<%# eval("news") %>' />                 <br />                 <br />                     </itemtemplate>                     <separatorstyle backcolor="aqua" font-bold="false" font-italic="false" font-overline="false" font-strikeout="false" font-underline="false" forecolor="gray" horizontalalign="left" />                 </asp:datalist>             </contenttemplate>         </asp:updatepanel>

assistance required please, thanks

<asp:timer id="timer1" runat="server" ontick="timer1_tick" interval="5000"></asp:timer>  <asp:updatepanel id="updatepanel1" runat="server">     <contenttemplate>         <asp:datalist id="datalist1" runat="server"></asp:datalist>     </contenttemplate>     <triggers>         <asp:asyncpostbacktrigger controlid="timer1" eventname="tick" />     </triggers> </asp:updatepanel>

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