Nested RadAjaxPanel with Update Mode Always

[mehdi]

Hi
I create a ajaxpanel and add to it some of control,also i add a ajaxpanel .i assign always mode two ajaxpanel ,equal to "Always".
but when either of ajaxpanel updating other of ajaxpanel hide from my page..
  i test this scenario with updatepanel asp.net and it worked correctly...

        <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" Height="100%" 

            Width="100%"  LoadingPanelID="RadAjaxLoadingPanel1" 

            onajaxsettingcreated="RadAjaxPanel1_AjaxSettingCreated" >

            <asp:Button Text="FirstButton" ID="FirstButton" runat="server" onclick="FirstButton_Click" />

            <asp:TextBox runat="server" ID="FirstTxt" />

  

            <telerik:RadAjaxPanel ID="RadAjaxPanel2" runat="server" Height="200px" 

                Width="300px" LoadingPanelID="RadAjaxLoadingPanel1" 

                onajaxsettingcreated="RadAjaxPanel2_AjaxSettingCreated" >

                <asp:Button Text="SecondButton" ID="SecondButton" runat="server" 

                    onclick="SecondButton_Click" style="margin-bottom: 0px" />

                <asp:TextBox runat="server"  ID="SecondTxt"/>

                <asp:Label  ID="SecondLable" runat="server" />

            </telerik:RadAjaxPanel>

          

        </telerik:RadAjaxPanel>

  

  

protected void RadAjaxPanel1_AjaxSettingCreated(object sender, Telerik.Web.UI.AjaxSettingCreatedEventArgs e)

        {   

            e.UpdatePanel.UpdateMode = UpdatePanelUpdateMode.Always;

        }

  

        protected void RadAjaxPanel2_AjaxSettingCreated(object sender, Telerik.Web.UI.AjaxSettingCreatedEventArgs e)

        {

            e.UpdatePanel.UpdateMode = UpdatePanelUpdateMode.Always;

        }

  

        protected void FirstButton_Click(object sender, EventArgs e)

        {

            SecondTxt.Text = "ok";

        }

  

        protected void SecondButton_Click(object sender, EventArgs e)

        {

  

            FirstTxt.Text = "ok";

            SecondTxt.Text = "ok";

            txt3.Text = "ok";

            SecondLable.Text = "ok";
           }