ASP.Net Membership Forms Remember Me is not retained when hosted on Shared hosting

Hi, why remember me doesn't work? as you can see in picture below Expire date is at the end of session although I set expiration to 1 month. why? this is my login button codes

protected void btn_login_Click(object sender, EventArgs e)
{
    if (!Page.User.Identity.IsAuthenticated)
    {
    if (GetMemberAuthenticate(txt_uname.Text, FormsAuthentication.HashPasswordForStoringInConfigFile(txt_pass.Text, "MD5")))
    {
        string role = GetMemberRoleByID(txt_uname.Text);
        DateTime expiration;
        if (chk_rememberme.Checked)
        {
            expiration = DateTime.Now.AddMonths(1);
        }
        else
        {
            expiration = DateTime.Now.AddMinutes(10);
        }
        FormsAuthenticationTicket AuthTicket = new FormsAuthenticationTicket(1, txt_uname.Text, DateTime.Now, expiration, false, role);
        string encryptedTicket = FormsAuthentication.Encrypt(AuthTicket);
            HttpCookie AuthCookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket);
            Response.Cookies.Add(AuthCookie);
            string[] temp = role.Split(',');
            for (int i = 0; i < temp.Length; i++)
            {
                if (temp[i] == "Admin")
                {
                    Response.Redirect("AdminPage.aspx");
                }
            }
            if (Session["CurrentUrl"] != null)
            {
                Response.Redirect(Session["CurrentUrl"].ToString());
            }
            Response.Redirect(FormsAuthentication.GetRedirectUrl(txt_uname.Text, chk_rememberme.Checked));
        }
        else
        {
            lbl_login.Visible = true;
        }
    }
    else
    {
        lbl_login.Visible = true;
        lbl_login.Text = "";
    }
}

and in web.config

<authentication mode="Forms">
    <forms loginUrl="Default.aspx" defaultUrl="~/" name="MyCookieName"
        slidingExpiration="true" timeout="43200"></forms>
</authentication>

and this is in global.asax

void Session_End(object sender, EventArgs e)
{
    // Code that runs when a session ends.
    // Note: The Session_End event is raised only when the sessionstate mode
    // is set to InProc in the Web.config file. If session mode is set to StateServer
    // or SQLServer, the event is not raised.
 
 
 
 
    Session.RemoveAll();
    Session.Abandon();
    Application.Lock();
    Application["Online"] = (int)Application["Online"] - 1;
    Application.UnLock();
 
}
 
protected void Application_AuthenticateRequest(object sender, EventArgs e)
{
    HttpCookie authCookie = Context.Request.Cookies[FormsAuthentication.FormsCookieName.ToString()];
    if (authCookie != null)
    {
        FormsAuthenticationTicket MyTicket;
        MyTicket = FormsAuthentication.Decrypt(authCookie.Value);
        FormsIdentity MyIdentity = new FormsIdentity(MyTicket);
        GenericPrincipal MyPrincipal = new GenericPrincipal(MyIdentity, MyTicket.UserData.Split(new char[] { ',' }));
        Context.User = MyPrincipal;
    }
 
}