Cant find element

Hi with this code can open app, but a cant find any element.
Could you help me please?

Thx

using Microsoft.VisualStudio.TestTools.UnitTesting;
using OpenQA.Selenium;
using OpenQA.Selenium.Appium;
using OpenQA.Selenium.Appium.Windows;
using OpenQA.Selenium.Interactions;
using OpenQA.Selenium.Support.UI;
using System;
using System.Diagnostics;
using System.Threading;

namespace IPTV
{
[TestClass]
public class TestIPTV
{
static WindowsDriver Session;

    [ClassInitialize]

    public static void PreparingBeforeTest(TestContext testContext)
    {
        AppiumOptions appiumOptions = new AppiumOptions();
        appiumOptions.AddAdditionalCapability("app",@"C:\Users\renata.cikova\Desktop\IPTVManagement\Colosseo.IPTVManagement.exe");
        Session = new WindowsDriver<WindowsElement>(new Uri("http://127.0.0.1:4723/"), appiumOptions);
        Thread.Sleep(20);


    }

    [TestMethod]
    public void Login()
    {
        Thread.Sleep(25);
        Session.FindElementByClassName("Window").FindElementByName("Login").Click();


        

    }
}

}