Error RadAjaxPanel : "clvp" object null or undefined

[D]

Hi,
When I try to ajaxified some controls in my RadDock, I've an error (see screen in attached file). This error occurs after executing "RadButtonChangeUrl_Click". 
Error : Microsoft JScript:Enable to get the "clvp" property value ; object null or undefined.

MasterPage :

<asp:ScriptManager id="ScriptManager" runat="server" EnablePageMethods="false" EnablePartialRendering="true" EnableScriptGlobalization="false" EnableScriptLocalization="true" >
</asp:ScriptManager>

Page.ascx :

<telerik:RadDockLayout ID="RadDockLayout1" Visible="false" runat="server">
    <telerik:RadDockZone ID="RadDockZone1" runat="server" Width="400px" BackColor="White" BorderStyle="None">
        <telerik:RadDock ID="RadDockGRIDisSCode" Visible="false" runat="server" Width="400px" DefaultCommands="ExpandCollapse">
                <ContentTemplate>
                    <telerik:RadAjaxPanel ID="RadAjaxLoadingPanel1" runat="server" Width="256px" Height="64px">
                            <asp:HyperLink ID="LabelUrlReporting" runat="server" Target="_blank"></asp:HyperLink>
                            <telerik:RadButton ID="RadButtonChangeUrl" runat="server" OnClick="RadButtonChangeUrl_Click">
                            </telerik:RadButton>
                            <telerik:RadTextBox ID="RadTextBoxNewUrl" Visible="false" runat="server" TextMode="SingleLine" EmptyMessage="-" Width="280px" />
                            <telerik:RadButton ID="RadButtonNewUrl" runat="server" Visible="false" OnClick="RadButtonNewUrl_Click">
                            </telerik:RadButton>
                            <telerik:RadButton ID="RadButtonCancelUrl" runat="server" Visible="false" OnClick="RadButtonCancelUrl_Click">
                            </telerik:RadButton>
                    </telerik:RadAjaxPanel>
                </ContentTemplate>
        </telerik:RadDock>
    </telerik:RadDockZone>
</telerik:RadDockLayout>

Page ascx.cs :

public void CreateRadDockGRIDisSCode(GridDataItem _SelectedItem)
{
    RadDockLayout1.Visible = true;
    RadDockGRIDisSCode.Visible = true;
    LabelUrlReporting.Text = "MyUrl";
    LabelUrlReporting.NavigateUrl = "http://www.myurl.com";
}

 public void RadButtonChangeUrl_Click(object sender, EventArgs e)
{
    LabelUrlReporting.Visible = false;
    RadButtonChangeUrl.Visible = false;

    RadTextBoxNewUrl.Visible = true;
    RadTextBoxNewUrl.Text = LabelUrlReporting.Text;
    RadButtonCancelUrl.Text = "Cancel";
    RadButtonCancelUrl.Visible = true;

    RadButtonNewUrl.Text = "OK";
    RadButtonNewUrl.Visible = true;
}

public void RadButtonCancelUrl_Click(object sender, EventArgs e)
{
    LabelUrlReporting.Visible = true;
    RadButtonChangeUrl.Visible = true;
    RadTextBoxNewUrl.Visible = false;
    RadButtonCancelUrl.Visible = false;
    RadButtonNewUrl.Visible = false;
}

public void RadButtonNewUrl_Click(object sender, EventArgs e)
{
    LabelUrlReporting.Visible = true;
    RadButtonChangeUrl.Visible = true;
    RadTextBoxNewUrl.Visible = false;
    RadButtonCancelUrl.Visible = false;
    RadButtonNewUrl.Visible = false;
    LabelUrlReporting.NavigateUrl = RadTextBoxNewUrl.Text;
    LabelUrlReporting.Text = RadTextBoxNewUrl.Text;
}

Thanks .

[Maria Ilieva]

Hi,

Please note that the RadDock is not a standard control and you can't update only one RadDock separately. If you want to make an Ajax call you should update the parent RadDockZone.
I hope this helps.

Regards,
Maria Ilieva
the Telerik team