how come I get when I logout.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Globalization;
using System.IO;
using System.Web.Security;
 
namespace OmegaLove.Web.UI
{
    public partial class ctrlLogin : OmegaLoveBasePageUserControl
    {
        protected MembershipUser loginUser;
 
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                // Search recursively for a Login control, called LoginStatus
                // starting from within the Page object.
                Login curLogin = FindControl<Login>(this, "LoginStatus");
 
                // You still should check whether you got something back!
                if (curLogin != null)
                    Page.SetFocus(curLogin.FindControl("UserName"));
            }
        }
 
 
        // Search recursively a control sub-tree for a specific control.
        // It searches every control in the sub-tree, so it potentially
        // could be optimized to search only, say, INamingContainers.
        public T FindControl<T>(string id) where T : Control
        {
            return FindControl<T>(Page, id);
        }
 
        public static T FindControl<T>(Control startingControl, string id) where T : Control
        {
            T found = null;
            foreach (Control activeControl in startingControl.Controls)
            {
                found = activeControl as T;
                if (found == null)
                {
                    found = FindControl<T>(activeControl, id);
                }
                else if (string.Compare(id, found.ID, true) != 0)
                {
                    found = null;
                }
                if (found != null)
                {
                    break;
                }
            }
            return found;
        }
 
 
        protected void btnLogout_Click(object sender, EventArgs e)
        {
            MembershipUser mu = Membership.GetUser();
            mu.Comment = String.Empty;
            Membership.UpdateUser(mu);
            FormsAuthentication.SignOut();
           
        }
 
 
        protected void LoginStatus_LoggedIn(object sender, EventArgs e)
        {
            if (loginUser == null)
            {
                var lgnMain = ((Login)LoginView1.FindControl("LoginStatus"));
                string username = lgnMain.UserName;
 
                loginUser = Membership.GetUser(username);
            }
 
            // represents the active login session
            Guid g = Guid.NewGuid();
            HttpCookie c = Response.Cookies[FormsAuthentication.FormsCookieName];
            FormsAuthenticationTicket ft = FormsAuthentication.Decrypt(c.Value);
 
            //Generate a new ticket that includes the login session ID
            var ftNew = new FormsAuthenticationTicket(
                ft.Version,
                ft.Name,
                ft.IssueDate,
                ft.Expiration,
                ft.IsPersistent,
                g.ToString(),
                ft.CookiePath);
 
            ////Store the expiration date and login session ID in Membership
            //loginUser.Comment = "LoginExpiration;" + ft.Expiration + "|LoginSessionID;" + g;
            //Membership.UpdateUser(loginUser);
 
            ////Re-issue the updated forms authentication ticket
            //Response.Cookies.Remove(FormsAuthentication.FormsCookieName);
 
            ////Basically clone the original cookie except for the payload
            //var newAuthCookie = new HttpCookie(
            //    FormsAuthentication.FormsCookieName,
            //    FormsAuthentication.Encrypt(ftNew));
 
            ////Re-use the cookie settings from forms authentication
            //newAuthCookie.HttpOnly = c.HttpOnly;
            //newAuthCookie.Path = c.Path;
            //newAuthCookie.Secure = c.Secure;
            //newAuthCookie.Domain = c.Domain;
            //newAuthCookie.Expires = c.Expires;
 
            ////And set it back in the response
            //Response.Cookies.Add(newAuthCookie);
        }
 
        protected void LoginStatus_LoggingIn(object sender, LoginCancelEventArgs e)
        {
            //if (loginUser == null)
            //{
            //    var lgnMain = ((Login)LoginView1.FindControl("LoginStatus"));
            //    string username = lgnMain.UserName;
 
            //    loginUser = Membership.GetUser(username);
            //}
 
 
            //Only need to check if the user instance already has login information
            //stored in the Comment field.
            //if ((!Equals(loginUser, null)))
            //    if ((!String.IsNullOrEmpty(loginUser.Comment)) && loginUser.Comment.Contains("LoginExpiration"))
            //    {
            //        string currentExpirationString = loginUser.Comment.Split("|".ToCharArray())[0];
            //        DateTime currentExpiration = DateTime.Parse((currentExpirationString.Split(";".ToCharArray()))[1]);
 
 
            //        //The user was logged in at some point previously and the login is still
            //        //valid
            //        if (DateTime.Now <= currentExpiration)
            //        {
            //            e.Cancel = true;
            //            var tx = (Literal) LoginView1.FindControl("FailureText");
            //            ScriptManager.RegisterStartupScript(Page, GetType(), "message",
            //                                                "alert('You are already logged in. You are being logged out!');",
            //                                                true);
            //        }
            //    }
 
        }
    }
 
}

                                              

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