HTTP错误401.0-未经授权

我有这4个类：

public class Personal
        {
            public int Id { get; set; }
            public string Name { get; set; }
        }
public class LoginRepository
    {
        Context context = new Context();
        public Personal GetByUsernameAndPassword(Personal user)
        {
            return context.Personals.Where(u => u.Name==user.Name).FirstOrDefault();
        }
    }
public class LoginApplication
    {
        LoginRepository userRepo = new LoginRepository();
        public Personal GetByUsernameAndPassword(Personal user)
        {
            return userRepo.GetByUsernameAndPassword(user);
        }
    }
public class SessionContext
    {
        public void SetAuthenticationToken(string name, bool isPersistant, Personal userData)
        {
            string data = null;
            if (userData != null)
                data = new JavaScriptSerializer().Serialize(userData);
            FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1, name, DateTime.Now, DateTime.Now.AddYears(1), isPersistant, data);
            string cookieData = FormsAuthentication.Encrypt(ticket);
            HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, cookieData)
            {
                HttpOnly = true,
                Expires = ticket.Expiration
            };
            HttpContext.Current.Response.Cookies.Add(cookie);
        }
        public Personal GetUserData()
        {
            Personal userData = null;
            try
            {
                HttpCookie cookie = HttpContext.Current.Request.Cookies[FormsAuthentication.FormsCookieName];
                if (cookie != null)
                {
                    FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(cookie.Value);
                    userData = new JavaScriptSerializer().Deserialize(ticket.UserData, typeof(Personal)) as Personal;
                }
            }
            catch (Exception ex)
            {
            }
            return userData;
        }
    }

在我的控制器中，我有这个：

 public class HomeController : Controller
    {
        LoginApplication userApp = new LoginApplication();
        SessionContext context = new SessionContext();
        public ActionResult Index()
        {
            return View();
        }
        [HttpPost]
        public ActionResult Index(Personal user)
        {
            var authenticatedUser = userApp.GetByUsernameAndPassword(user);
            if (authenticatedUser != null)
            {
                context.SetAuthenticationToken(authenticatedUser.Name, false, authenticatedUser);
                return RedirectToAction("Index", "Asp");
            }
            return View();
        }
    }

但问题是，即使我使用正确的名称登录，我也会看到这个错误：

HTTP错误401.0-未经授权您没有查看此目录或页面的权限。

我认为会议没有创建。我该怎么办？