asp.net Updatepanel anomalia aggiornamenti

[garzone]

In questa situazione con due UpdatePanel e due timer, ognuno all'interno del suo panel,
perchè mi si aggiornano tutte le textarea anche se il timer in funzione sta dentro all'updatepanel2???

grazie

<asp:UpdatePanel ID="UpdatePanel1" runat="server">


                                    <ContentTemplate>
                                        <asp:Timer ID="Timer1" runat="server" Enabled="False" Interval="1"></asp:Timer>
                                        <!--  <asp:TextBox ID="txtConsolle" runat="server" BackColor="Black" BorderStyle="Inset" Font-Names="Consolas" ForeColor="Lime" Height="263px" TextMode="MultiLine" Width="469px" ReadOnly="True" Font-Size="Small"></asp:TextBox> -->
                                        <br />
                                        <textarea runat="server" id="TextArea1" aria-multiline="False" aria-readonly="True" style="font-family: Consolas; font-size: 10px; color: #00FF00; background-color: #000000; height: 246px; width: 469px" readonly="readonly"></textarea>
                                        <%--<script>
                                            var textarea = document.getElementById('TextArea1');
                                            textarea.scrollTop = textarea.scrollHeight;
                                        </script>--%>
                                        <br />
                                    </ContentTemplate>
                                    <Triggers>
                                        <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
                                                                            </Triggers>
                                </asp:UpdatePanel>
                                <asp:TextBox ID="txtcomandi" runat="server" BackColor="Black" BorderColor="silver" BorderStyle="Inset" Font-Names="Consolas" ForeColor="Lime" Style="margin-top: 0px" TextMode="SingleLine" Width="412px" Height="16px" AutoCompleteType="Disabled" Font-Size="10px"></asp:TextBox>


                                <asp:ImageButton ID="EnterBtn" runat="server" BackColor="#999999" Height="20px" ImageUrl="~/image/Enter Key-64.png" ToolTip="Enter" Width="50px" />






                            </td>
                            <td>
                                <table id="tablechat" runat="server" style=" align-content: center" >


                                    <tr>


                                        <td  >
                                            <asp:UpdatePanel ID="UpdatePanel2" runat="server">


                                                <ContentTemplate>
                                                    <asp:Timer ID="Timer2" runat="server" Interval="3000"></asp:Timer>
                                                    <textarea runat="server" id="TextArea2" style="font-family: Consolas; font-size: 10px; color: #00FF00; background-color: #000000; height: 257px; width: 235px" readonly="readonly" name="S1" aria-multiline="False" ></textarea>
                                                    <%-- <script>
                                                        var textarea = document.getElementById('TextArea2');
                                                        textarea.scrollTop = textarea.scrollHeight;
                                                    </script>--%>
                                                </ContentTemplate>
                                                <Triggers>
                                                    <asp:AsyncPostBackTrigger ControlID="Timer2" EventName="Tick" />
                                                </Triggers>
                                            </asp:UpdatePanel>
                                            
                                           </td>
                                                </tr> 
                                    <tr>
                                                    <td style="text-align :left" class="auto-style13">
                                                       
                                                        <asp:TextBox ID="TxtMessage"  runat="server" AutoCompleteType="Disabled" BackColor="Black" BorderStyle="None" ForeColor="Lime"  Wrap="False" Width="220px"  ></asp:TextBox>
                                                        <asp:Button ID="btninviochat" runat="server" BorderStyle="None" Text="Send" style="text-align: center" Width="42px" />
                                                        
                                                            </td>
                                        </tr>         
                                          
                                        
                                  
                                </table>

[garzone]

risolto
Conditional mode