Accessing page by url

Hi There

I have a url that gets posted to my web site from another application .
when that url is posted to the site it does some proccessing
When I type in the url in my browser i get the following error message

Using themed css files requires a header control on the page. (e.g. <head runat="server" />).

How do I set up a aspx page to handle http posts.
The page must not be opened it must just run its process in the background
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Medibook.Business;
public partial class _SMSReciever : Page
  private MessengerManager m_messenger;
  private string SentFromNo;
  private string strMessage;
  private string MOBILE_MESSAGE;
  protected void Page_Load(object sender, EventArgs e)
      SentFromNo = Request.QueryString["From"];
      strMessage = Request.QueryString["Text"];
    private void sendToEmergencyContacts()
        MOBILE_MESSAGE = "Testing two way sms";
        m_messenger = new MessengerManager("+" + SentFromNo, "+27840031277", MOBILE_MESSAGE + "-" + strMessage);

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If the page is never intended to be human viewed you are better of using a "Generic Handler" instead of a .net WebForm.
I suspect the message you are getting is because you are using .NET Themes in your WebForms perhaps through a base page class? The automatic application of a stylesheet to your page through theming is failing possibly due to an alteration of the html of the form?

If this is correct then you either need to detach this page from your theming (view the html page tag and check for Theme="xxxx" - remove it , or , unlink it from your page class/modify behaviour of)

Using a generic handler avoids the association of the html to the page.

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