When I use the callback panel to show a progress bar when i press on the Save button and in the code behind I do a CallBackPanel Redirect I get a message box, about IE not being able to open the webpage. (best translation: The website XXX can't been opened. De oparation is aborted. whit a critical icon.)
If I don't use the callback panel i don't get te message. Also it only happens with largs amount of data.
Code Sample
HTML        <tr>
            <td class="TextInfo" colspan="2" style="text-align: right; height: 30px;">
                <asp:ValidationSummary ID="Summary" runat="server" />
                <asp:ImageButton ID="btnSave" runat="server" ImageUrl="~/Lib/Icons/24x24/disk_blue.gif"
                    OnClick="btnSave_Click" />
                <asp:Image ID="btnCancel" runat="server" ImageUrl="~/Lib/Icons/24x24/error.gif" />
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <eo:CallbackPanel runat="server" ID="cpPB" Triggers="{ControlID:btnSave;Parameter:}"
                    Width="100%" LoadingHTML="<img src='../../../Lib/Images/progress1.gif' />">
                </eo:CallbackPanel>
            </td>
        </tr>
C#    protected void btnSave_Click(object sender, ImageClickEventArgs e)
    {
        OfficeWeb.Sys.Project.Copy Copy = new OfficeWeb.Sys.Project.Copy();
        Copy.ProjectId = new Guid(ViewState["DataKey"].ToString());
        Copy.ProjectName = txtProjectName.Text;
        Copy.ProjectStartDate = txtStartdate.SelectedDate;
        Copy.ProjectEndDate = txtEnddate.SelectedDate;
        Copy.OrderNumber = txtOrderNumber.Text;
        Copy.DepartmentId = new Guid(ddDepartment.SelectedValue);
        if (Copy.CopyProject())
            cpPB.Redirect("CopySubProject.aspx?DataKey=" + ViewState["DataKey"].ToString() + "&Project=" + Copy.ProjectId.ToString());
    }
Patrick Beverloo
OfficeSpecialisten 
www.OfficeSpecialisten.nl