I am tring to login using asp.net authentication in nokia e5-00 device. The login proccess success under explorer, firefox, android devices and so on. But in the nokia device the HttpContext.Current.User.Identity.IsAuthenticated is false even though the authentication succeeded.
Here is my login method:

public static void Login(User user)
{
HttpResponse Response = HttpContext.Current.Response;
HttpRequest Request = HttpContext.Current.Request;

FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1,
user.Id.ToString(), DateTime.Now, DateTime.Now.AddHours(12), true,
user.Id.ToString());

string data = FormsAuthentication.Encrypt(ticket);
HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, data);
cookie.Expires = ticket.Expiration;

Response.Cookies.Add(cookie);

string redirectUrl = UserPages.Home;
Response.Redirect(redirectUrl, false);
}

Later, in the aspx page, when I try to get the user, but HttpContext.Current.User.Identity.IsAuthenticated is still false.

But in all other browsers IsAuthenticated is true and everything is fine.

This behavior happens in all nokia devices. After checking, I see the the cookie stored in the nokia but IsAuthenticated is still false.

What can cause to this problem? What is wrong with the nokia devices??