Threads on leaving the asp.net page

Edited by SomeNewKid. Please post code between <code> and </code> tags.

Hallo, I have 2 IIS Server. On both i have a asp.net script. The first script on the first server connects to the second script on the second server ba an HttpWebRequest-objects. The second asp.net-script sends the xml-answer by Response.Write(). My problem is now that i have to get a thread doing more work after the second script has ended. So before the end of the second script i instanciate a new Thread by a own c#-class.

ResponseRequester responseRequester = new ResponseRequester();
responseRequester.setAbsolutePath(Server.MapPath("."));
responseRequester.setURL(url);
responseRequester.confirm();

The class starts the Thread:

using System;
using System.Collections;
using System.Threading;
using System.Xml;

namespace tinasimulator
{
	/// 
	/// Summary description for ResponseRequester.
	/// 
	public class ResponseRequester
	{

		/// 
		/// The url to send the request to.
		/// 
		private string url = "";
		private Thread confirmer = null;
		private string absolutePath = "";

		public ResponseRequester()
		{
		}


		public void setAbsolutePath(string absolutePath)
		{
			this.absolutePath = absolutePath;
		}

		///
		///Sets the url to connect to.
		///
		public void setURL(String url)
		{
			this.url = url;
		}

		///
		///start the thread to connect to the tinasimulator.
		///
		public void confirm()
		{
			try
			{
				this.confirmer = new Thread(new ThreadStart(this.send));
				this.confirmer.Name = "confirmer";
				this.confirmer.Priority = ThreadPriority.Highest;
				this.confirmer.Start();
				Logger.log("Thread started");
			}
			catch(Exception e)
			{
				Logger.log(e.ToString());
			}
		}

		public void send()
		{
                                                Thread.sleep(5000);
			//read the server data from a file
			ConfigLoader configLoader = new ConfigLoader(); 
			Hashtable config = configLoader.loadConfig					//send the request
			ServerConnector serverConnector = new ServerConnector();
			string requestEndXML = 
				"......";
			XmlDocument requestEndXMLDocument = new 			requestEndXMLDocument.LoadXml(requestEndXML);
			serverConnector.sendRequest(requestEndXMLDocument, url, (String) config["user"], (String) config["password"]);
		}

	}
}

The class Server connector connects to another server. I can't do it in another way - sorry. So my problem is that after the page is left the thread crashes. VS.NET2003 says: "An unhandled exception of type 'System.NullReferenceException' occurred in Unknown Module. Additional information: Object reference not set to an instance of an object." So what i am doing wrong to get the thread be alive after the page is over? Thanks for any help.