Problema com MasterPage

Olá estou com fificuldade em visualizar um gridView que está dentro de uma página aspx de dentro de uma master page. O problema é que eu tenho dois Content e quando eu coloco qualquer outro componente como por exemplo um button ou escrevo alguma coisa aparece normalmente, o problema só é com o gridView.

já tentei mudar o grid de lugar e tmb não deu certo.


<%@ Page Title="" Language="C#" MasterPageFile="~/Manage/MasterPage.master" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Manage_Products_Default" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="menu_admin" Runat="Server">
<div>
    <asp:FormView ID="frmAdd" runat="server" DataSourceID="srcEditProducts"
        DefaultMode="Insert" oniteminserted="frmAdd_ItemInserted">
        <InsertItemTemplate>
            <asp:Label ID="lblName" Text="Name:"  runat="server" AssociatedControlID="txtName" />
           
            <asp:RequiredFieldValidator ID="reqName" ControlToValidate="txtName" Text="(Required)"
                ValidationGroup="Add" runat="server" />

           
            <asp:TextBox ID="txtName" Text='<%# Bind("Title") %>' runat="server" />&nbsp;<br />
            <br />
       
           
           
                <asp:Label ID="lblCategory" Text="Category:" runat="server" AssociatedControlID="drpCategory" />
                                    <asp:RequiredFieldValidator ID="reqCategory" runat="server" ControlToValidate="drpCategory"
                        ErrorMessage="(Requerid)" InitialValue="Choose a category" ValidationGroup="Add" />
               
               
                <div>
                    Select a product category.<br />
                    <asp:DropDownList ID="drpCategory" runat="server" DataSourceID="sqlDsCategory"
                        DataTextField="Title" DataValueField="CategoryID" SelectedValue='<%# Bind("CategoryID") %>' AppendDataBoundItems="True">
                        <asp:ListItem Selected="True">Choose a category</asp:ListItem>
                    </asp:DropDownList>
                    <asp:SqlDataSource ID="sqlDsCategory" runat="server" ConnectionString="<%$ ConnectionStrings:StoreString %>"
                        SelectCommand="SELECT [CategoryID], [Title] FROM [Hof_Categories] ORDER BY [Title]">
                    </asp:SqlDataSource>
                    <br />

                  </div>
          
           <br />
                <asp:Label ID="lblPrice" Text="Price:" runat="server" AssociatedControlID="txtPrice" />
                <asp:RequiredFieldValidator ID="reqPrice" ControlToValidate="txtPrice" Text="(Required)"
                    Display="Dynamic" ValidationGroup="Add" runat="server" />
                <asp:CompareValidator ID="valPrice" ControlToValidate="txtPrice" Text="(Currency)"
                    Operator="DataTypeCheck" Type="Currency" ValidationGroup="Add" Display="Dynamic"
                    runat="server" />
                <div class="instructions">
                    Enter the product price.
                </div>
                <asp:TextBox ID="txtPrice" Columns="5" Text='<%# Bind("Price") %>' runat="server"  />
         
            <br style="clear: both" />
            <br />
            <asp:Label ID="lblDescription" Text="Brief Description (can include HTML):" AssociatedControlID="txtDescription"
                runat="server" />
            <asp:RequiredFieldValidator ID="reqDescription" ControlToValidate="txtDescription"
                Text="(Required)" ValidationGroup="Add" runat="server" />
            <div class="instructions">
                The brief description appears in the Products.aspx page and in advertisements.
            </div>
            <asp:TextBox ID="txtDescription" Text='<%#Bind("Description")%>' TextMode="multiLine"
                Columns="40" Rows="2" runat="server" />&nbsp;<br />
            <br />
            <br />
            <asp:Label ID="lblImage" Text="Image:" AssociatedControlID="upImage" runat="server" />
                <div class="instructions">
                (Optional)Upload a product image from your hard drive.
            </div>
            <asp:FileUpload ID="upImage" runat="server" FileName='<%# Bind("ImageURL") %>' />&nbsp;<br />
            <div>
            </div>
            <br />
            <asp:Button ID="btnAdd" Text="Add Product" CommandName="Insert" ValidationGroup="Add"
                runat="server" />
            <asp:Button ID="btnCancel" Text="Cancel" CausesValidation="false" CommandName="Cancel"
                runat="server" />
        </InsertItemTemplate>
    </asp:FormView>
    <asp:ObjectDataSource ID="srcEditProducts" runat="server"
        OldValuesParameterFormatString="original_"
        onupdated="srcEditProducts_Updated" SelectMethod="Select"
        TypeName="DevMedia.ECommerce.Product" UpdateMethod="Update">
        <UpdateParameters>
            <asp:Parameter Name="productid" Type="Int32" />
            <asp:Parameter Name="categoryId" Type="Int32" />
            <asp:Parameter Name="title" Type="String" />
            <asp:Parameter Name="price" Type="Decimal" />
            <asp:Parameter Name="description" Type="String" />
            <asp:Parameter Name="imageUrl" Type="String" />
        </UpdateParameters>
        <SelectParameters>
            <asp:ControlParameter ControlID="frmAdd" Name="productId"
                PropertyName="SelectedValue" Type="Int32" />
        </SelectParameters>
    </asp:ObjectDataSource>
    <br />
</div>
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="ContentPlaceHolder2" Runat="Server">
    111111111111111111111111111<asp:GridView ID="grdProducts" runat="server" AutoGenerateColumns="False"
        DataSourceID="srcProdutcts" DataKeyNames="ProductID" CellPadding="3"
        GridLines="Vertical" BackColor="White" BorderColor="#999999" BorderStyle="None"
        BorderWidth="1px">
        <RowStyle BackColor="#EEEEEE" ForeColor="Black" />
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                       <asp:LinkButton
            id="lnkEdit"
            Text="Edit"
            CommandName="Select"
            Runat="server" />
        /
        <asp:LinkButton
            id="lnkDelete"
            Text="Delete"
            CommandName="Delete"
            OnClientClick="return confirm('Are you sure that you want to delete this product?')"
            Runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField DataField="ProductID" HeaderText="ProductID"
                SortExpression="ProductID" />
            <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
            <asp:BoundField DataField="Description" HeaderText="Description"
                SortExpression="Description" />
            <asp:BoundField DataField="Price" HeaderText="Price" SortExpression="Price" />
            <asp:BoundField DataField="CategoryTitle" HeaderText="CategoryTitle"
                SortExpression="CategoryTitle" />
        </Columns>
        <FooterStyle BackColor="#CCCCCC" ForeColor="Black" />
        <PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
        <SelectedRowStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />
        <HeaderStyle BackColor="#000084" Font-Bold="True" ForeColor="White" />
        <AlternatingRowStyle BackColor="#DCDCDC" />
    </asp:GridView>
    <asp:ObjectDataSource ID="srcProdutcts" runat="server" DeleteMethod="Delete"
        InsertMethod="Insert" OldValuesParameterFormatString="original_"
        SelectMethod="Select" TypeName="DevMedia.ECommerce.Product">
        <DeleteParameters>
            <asp:Parameter Name="ProductId" Type="Int32" />
        </DeleteParameters>
        <SelectParameters>
            <asp:ControlParameter ControlID="grdProducts" Name="productId"
                PropertyName="SelectedValue" Type="Int32" />
        </SelectParameters>
        <InsertParameters>
            <asp:Parameter Name="categoryId" Type="Int32" />
            <asp:Parameter Name="title" Type="String" />
            <asp:Parameter Name="description" Type="String" />
            <asp:Parameter Name="price" Type="Decimal" />
            <asp:Parameter Name="imageURL" Type="String" />
        </InsertParameters>
    </asp:ObjectDataSource>
    &nbsp;

</asp:Content>