Global asax and application_endrequest asp.net

Hello i got some question why when i run my method in global.asax it don't run and when i use IHttp module it is workin any advice.
Maybe its caused of context.PostRequestHandlerExecute += new EventHandler(Application_EndRequest);

Is it posible to call it without Module?

Code Example:

Method that i run

        public static void EndSession()
     {
         HttpContext context = HttpContext.Current;
         if (context.Session != null)
         {
             ISession session = context.Session["Session"] as ISession;
             if (context.Session["Session"] != null)
             {
                 if (!session.Transaction.IsActive)
                     OpenTransaction(session);
                 session.Flush();
                 CommitTransaction(session);
                 session.Close();
                 context.Session["Session"] = null;
             }
         }
     }
 

Global

        private void Application_EndRequest(object sender, EventArgs e)
     {
        NhSessionHelper.EndSession();
     }
 

IHTTPMODULE

  namespace MME.DAL.SesionManager
    {
 internal class SessionRequest : IHttpModule
 {
     #region Public Methods
 
     public void Dispose()
     {
     }
 
     public void Init(HttpApplication context)
     {
         context.PostRequestHandlerExecute += new EventHandler(Application_EndRequest);
     }