web.config设置了 但是用户不能登陆

/// <summary>
        /// 赋值Cookie
        /// </summary>
        /// <param name="day">过期时间</param>
        /// <param name="username">用户名</param>
        /// <param name="roles">权限</param>
        public static void SetCookie(int day, string username, string roles)
        {
            FormsAuthenticationTicket ticket = new FormsAuthenticationTicket
            (
                    1,                                      // 票据版本号
                    username.ToString().Trim(),             // 票据持有者
                    DateTime.Now,                           // 分配票据的时间
                    DateTime.Now.AddDays(day),              // 票据失效时间
                    false,                                  // 是否持久性的 cookie
                    roles.ToString().Trim()                 // 用户数据，这里其实就是用户的角色
            );
            string hashTicket = FormsAuthentication.Encrypt(ticket);
            HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hashTicket);
            cookie.Path = FormsAuthentication.FormsCookiePath;
            cookie.Domain = FormsAuthentication.CookieDomain;
            cookie.Expires = ticket.Expiration;             //将cookie的失效时间设置为和票据tikets的失效时间一致
            HttpContext.Current.Response.Cookies.Add(cookie);
        }

  <location path="Manager">
    <system.web>
      <authorization>
        <allow roles="admin"/>
        <deny users="*"/>
      </authorization>
    </system.web>
  </location>
    <connectionStrings/>
    <system.web>