Where did the run time take it? AJAX

The AppendRow method is not being executed. I am assuming it's somewhere in the AJAX call below. There is no error, it just goes to sleep. Can anyone see what I've missed? Thanks.   

+++++++++++++++++++++++++++++++++ Default.aspx +++++++++++++++++++++++++++

$(document).ready(function () {
        getProducts();
             $("#btn").on('click', function () {
                //1.
                //var order = {
                //    "CustomerName": "MS"
                //};
                //2.
                var prodDTO = [
                    { "Id": "4", "Name": "Guava Mango Drink", "Category": "Beverages", "Price": "1.50" },
                ];
                //3.
                $.ajax({
                    url: '/api/products/AppendRow',
                    type: 'POST',
                    //4.
                    data: {
                        //order: order,
                        prodDTO: prodDTO
                    },
                    ContentType: 'application/json;utf-8',
                    datatype: 'json'
                }).done(function (resp) {
                    alert("Successful " + resp);
                }).error(function (err) {
                    alert("Error " + err.status);

                });

            });
            return false;

        });

+++++++++ Product.cs +++++++++++++++++++++++

using Newtonsoft.Json;

public class Product
{
    public int Id { get; set; }
    public string Name { get; set; }
    public decimal Price { get; set; }
    public string Category { get; set; }
}
//public class ProductDTO
//{
    //public int Id { get; set; }
    //public string Name { get; set; }
    //public string Category { get; set; }
    //public double Price { get; set; }
//}

public class YourObjectDto
{
    [JsonProperty("id")]
    public int Id { get; set; }

    [JsonProperty("name")]
    public string Name { get; set; }

    [JsonProperty("category")]
    public string Category { get; set; }

    [JsonProperty("price")]
    public double Price { get; set; }
}
 ++++++++++++++++++++++++++++++++++++++ ProductsController.cs +++++++++++++++++++++++++++++

namespace WebForms
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Net;
    using System.Net.Http;
    using System.Web.Http;

    public class ProductsController : ApiController
    {

        Product[] products = new Product[]
        {
            new Product { Id = 1, Name = "Tomato Soup", Category = "Groceries", Price = 1 },
            new Product { Id = 2, Name = "Yo-yo", Category = "Toys", Price = 3.75M },
            new Product { Id = 3, Name = "Hammer", Category = "Hardware", Price = 16.99M }
        };

        public IEnumerable<Product> GetAllProducts()
        {
            return products;
        }

        public Product GetProductById(int id)
        {
            var product = products.FirstOrDefault((p) => p.Id == id);
            if (product == null)
            {
                throw new HttpResponseException(HttpStatusCode.NotFound);
            }
            return product;
        }

        public IEnumerable<Product> GetProductsByCategory(string category)
        {
            return products.Where(
                (p) => string.Equals(p.Category, category,
                    StringComparison.OrdinalIgnoreCase));
        }

        public string AppendRow([FromBody] YourObjectDto eventDto)
        {
            var id = eventDto.Id;
            var name = eventDto.Name;
            var category = eventDto.Category;
            var price = eventDto.Price;

            return "success";
        }
    }
}