Hi Adam,
does it work on your side? I've made a new content page within my master page. I added the ToolkitScriptManager and the TabContainer and Tabpanels. Everything works fine. I drag and drop CuteEditor, and it still displays fine. But when I then switch to the Source-View and back to Design-view I got this error message. Then it's not possible to create an additional tab pabel from the menu. Nevertheless the page is displayed fine in the browser. But I'm not sure whether this has any side effects so I would be glad if you could clarify on your side.

Thanks
Kai



<%@ Register Assembly="CuteEditor" Namespace="CuteEditor" TagPrefix="CE" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="PlaceHolderResponsibles" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="PlaceHolderWorkflowSteps" runat="server">
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="PlaceHolderMain" runat="server">
<form id="RequestForm" runat="server">
    <cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
    </cc1:ToolkitScriptManager>
    <cc1:TabContainer ID="TaskTabContainer" runat="server" ActiveTabIndex="0">
        <cc1:TabPanel ID="TabPanel1" runat="server" HeaderText="Overview">
            <ContentTemplate>

    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                <CE:Editor ID="Editor1" runat="server">
                </CE:Editor>
            </ContentTemplate>
        </cc1:TabPanel>
        <cc1:TabPanel ID="TabPanel2" runat="server" HeaderText="TabPanel2">
        </cc1:TabPanel>
        <cc1:TabPanel ID="TabPanel3" runat="server" HeaderText="TabPanel3">
        </cc1:TabPanel>
        <cc1:TabPanel ID="TabPanel4" runat="server" HeaderText="TabPanel4">
        </cc1:TabPanel>
    </cc1:TabContainer>&nbsp;
    </form>
</asp:Content>

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.net Framework 4.0 / ASP.net / VB / CuteEditor 6.7 / SQL 2005