Why this url not working? Please help me

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Configuration;
using MySql.Data.MySqlClient;
using ModelFields;

namespace WebApplicationPractise.Controllers
{
    public class MyTestController : Controller
    {
        // GET: MyTest
        public ActionResult Home()
        {
            
            return View();
        }

        [HttpPost]
        public ActionResult Register(RegisterFields rf)
        {
            string connection = ConfigurationManager.ConnectionStrings["ApplicationServices"].ConnectionString;
            using(MySqlConnection mysqlcon =new MySqlConnection())
            {
                string query = "insert into 3tier.jagadeesh(FirstName,LastName,Age,Address) values(@FirstName,@LastName,@Age,@Address)";
                using(MySqlCommand cmd =new MySqlCommand(query))
                {
                    cmd.Connection = mysqlcon;
                    mysqlcon.Open();
                    cmd.Parameters.AddWithValue("@FirstName", rf.FirstName);
                    cmd.Parameters.AddWithValue("@LastName", rf.LastName);
                    cmd.Parameters.AddWithValue("@Age", rf.Age);
                    cmd.Parameters.AddWithValue("@Address", rf.Address);
                    mysqlcon.Close();
                    
                }
            }
           
            
            return View(rf);
        }

    }
}

@model ModelFields.RegisterFields
@{
    ViewBag.Title = "Register";
    Layout = "~/Views/Shared/MyTestLayoutPage.cshtml";
}

@using (Html.BeginForm("Register", "MyTest", FormMethod.Post))
{
    @Html.TextBoxFor(model => model.FirstName, new { placeholder = "FirstName" });
    @Html.TextBoxFor(model => model.LastName, new { placeholder = "FirstName" });
    @Html.TextBoxFor(model => model.Age, new { placeholder = "FirstName" });
    @Html.TextBoxFor(model => model.Address, new { placeholder = "FirstName" });
    <input type="submit" value="submit" />
}

@if (Model != null)
{
    <script type="text/javascript">
        $(function () {
            alert("data inserted successfully");
        });
    </script>
}