Nested update panel problem

 <asp:UpdatePanel ID="DetailsUpdatePanel" runat="server" Visible="false" UpdateMode="Conditional" >
<ContentTemplate>
<div><ajaxToolkit:AsyncFileUpload runat="server" ID="BrochureUpload" Width="400px"
        OnClientUploadError="BrochureuploadError"
        OnClientUploadStarted="BrochureStartUpload"
        OnClientUploadComplete="BrochureUploadComplete"
        CompleteBackColor="Lime" UploaderStyle="Modern"
        ErrorBackColor="Red" ClientIDMode="AutoID"
        ThrobberID="Throbber"
        UploadingBackColor="#66CCFF"
            onuploadedcomplete="BrochureUpload_UploadedComplete"/>
            <asp:Label ID="Label1" runat="server" Style="display: none">
 <asp:Image runat="server" ID="Image1" ImageUrl="~/Images/uploading.gif" />
        </asp:Label>
  <asp:Label ID="brochurelblstatus" runat="server" Style="font-family: Arial; font-size: small;"></asp:Label></div>
 <div><asp:UpdatePanel runat="server" ID="child" UpdateMode="Conditional" >
            <ContentTemplate>
            <div>
 <asp:GridView ID=GridView2" runat="server" AllowPaging="true" AutoGenerateColumns="false" CellPadding="0" CellSpacing="1" DataKeyNames="ArticleId">
    <Columns>
   <asp:BoundField DataField="ArticleId" HeaderText="ArticleId" ReadOnly="True" HeaderStyle-CssClass="td1" />
   <asp:BoundField DataField="FileName" HeaderText="FileName" ReadOnly="True" HeaderStyle-CssClass="td2" />
   <asp:TemplateField HeaderText="BrochureUrl">
   <ItemTemplate>
   <asp:HyperLink ID="lnkEPhoto" runat="server" BorderWidth="2px" NavigateUrl='<%# GetUrl(Eval("ArticleId"),Eval("FileName")) %>'
                Target="_blank"></asp:HyperLink>
      </ItemTemplate>
   </asp:TemplateField>
   <asp:TemplateField>
  <ItemTemplate>
   <asp:LinkButton ID="btnRemove" runat="server" text="Delete" CommandName="Delete" CausesValidation="False" OnClientClick="DeleteOrNo()">
   </asp:LinkButton>
     </ItemTemplate>
   </asp:TemplateField>
     </Columns>
    </asp:GridView>
       </div>

            </ContentTemplate>

            </asp:UpdatePanel></div>
</ContentTemplate>
</updatePanel>

 protected void BrochureUpload_UploadedComplete(object sender, AsyncFileUploadEventArgs e)
         {
             if(BrochureUpload.HasFile)
             {
                 if(BrochureUpload.PostedFile.ContentLength<=3670016 )
                 {
                     var brochurePath = MapPath("~/") + Path.GetFileName(e.filename);
                     BrochureUpload.SaveAs(brochurePath);
                     using (var dataContext = new NewsStandAloneDataContext(Config.StandaloneNewsConnectionString))
                     {
                         var brochure = new xxx
                                            {
                                                Id = Convert.ToInt32(GridView1.SelectedValue),
                                                FileName = Path.GetFileName(e.filename),
                                                RecordCreated = DateTime.Now
                                            };
                         dataContext.xxx.InsertOnSubmit(brochure);
                         dataContext.SubmitChanges();
                     }
                     bindGridView();//I have code to bind gridview
Child.Update();

                 }
             }
         }
protected void bindBrochureGridView() { using (var dataContext = new NewsStandAloneDataContext(Config.StandaloneNewsConnectionString)) { var brochureList = (from brochure in dataContext.xxx where brochure.ArticleId == Convert.ToInt32(GridView2.SelectedValue) select new ArcticleBrochure { ArticleId = brochure.ArticleId.ToString(), FileName = brochure.FileName

                                           }).ToList();
            GridView1.DataSource = brochureList;
            GridView1.DataBind();

        }
    }