Error: Content controls are allowed only in content page that references a master page

Hi,

I created a Application page and then trying to set a custom Master page.

The Master page is available in the Master page gallery of the subsite.

I have the UI as below:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ViewPage.aspx.cs" Inherits="Test.ViewPage" DynamicMasterPageFile="~masterurl/default.master" %><asp:Content ID="PageHead" ContentPlaceHolderID="PlaceHolderAdditionalPageHead" runat="server"></asp:Content><asp:Content ID="Main" ContentPlaceHolderID="PlaceHolderMain" runat="server"><div style="font-family: Calibri; color: #000000; font-size: 10pt;"><table style="width: 100%;">
//table contents</table></div></asp:Content><asp:Content ID="PageTitle" ContentPlaceHolderID="PlaceHolderPageTitle" runat="server">
    Some Title</asp:Content><asp:Content ID="PageTitleInTitleArea" ContentPlaceHolderID="PlaceHolderPageTitleInTitleArea" runat="server"></asp:Content>

In the CS code:

   protected override void OnPreInit(EventArgs e)
        {
            base.OnPreInit(e);

            string strUrl = "subsiteUrl/" + "_catalogs/masterpage/Test.master";
            this.MasterPageFile = strUrl;
        }

I am getting the error as "System.Web.HttpException: Content controls are allowed only in content page that references a master page.  
 at System.Web.UI.MasterPage.CreateMaster(TemplateControl owner, HttpContext context, VirtualPath masterPageFile, IDictionary contentTemplateCollection)   
 at System.Web.UI.Page.ApplyMasterPage() "

In the Custom Master page, I have verified that the ConentTemplateId's exist.

There is no commented data inside the table. I have used only controls like div, table, tr, td. Some of the TD have data like this:

<td>&nbsp;</td>

How to fix this?

Thanks