Response.BinaryWrite(bytes); and Update Progress

Question

User265788195 posted

Response.Buffer = true;
            Response.Clear();
            Response.ContentType = mimeType;
            Response.AddHeader("content-disposition", "attachment ; filename=MyReport." + extension);            
            Response.BinaryWrite(bytes);
            Response.End();

  <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
            <asp:UpdateProgress runat="server" ID="PageUpdateProgress" >
                <ProgressTemplate>
                    <div id="IMGDIV" align="center" valign="middle" runat="server" style="position: absolute;                         width: 30px; height: 30px; left: 35%; top: 25%; visibility: visible; vertical-align: middle;                         border-style: inset; border-color: black; background-color: #c8d1d4;">
                        <asp:Image ID="Image1" runat="server" ImageUrl="~/Images/wait.gif" />
                    </div>
                </ProgressTemplate>
            </asp:UpdateProgress>

      <Triggers>
            <asp:AsyncPostBackTrigger ControlID="btnGenerateExcel" EventName="Click" />          
        </Triggers>
    </asp:UpdatePanel>
    <div>        
        <asp:Button ID="btnGenerateExcel" runat="server" CssClass="btn" Text="Open in Excel"
            OnClick="btnGenerateExcel_Click" />
        <rsweb:ReportViewer ID="rptMyReport" runat="server" ProcessingMode="Remote" Width="1067px"
            Height="1034px" ShowCredentialPrompts="False">
        </rsweb:ReportViewer>   
    </div>

My Update progress shows up and gives me this error:

Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerParserErrorException:
The message received from the server could not be parsed. I googled a lot and found that it might be because update progress soes not do well with Response.BinaryWrite.. 

Any help please