Hi I'm using umbraco web api. I have a model

public class MyModel
{
public string Name1 { get; set; }
[Required]
[Range(1,12, ErrorMessage ="Invalid Month")]
public int myMonth { get; set; }
[Required]
[Range(00, 99, ErrorMessage = "Invalid Year")]
public int myYear { get; set; }
}

and in the controller

[HttpPost]
        public HttpResponseMessage TestMyModel(HttpRequestMessage request)
        {
            var msg = new HttpResponseMessage();
            XmlSerializer deserializer = new XmlSerializer(typeof(MyModel));
            try
            {
                var reader = new StringReader(request.Content.ReadAsStringAsync().Result);
                var mymodel = (MyModel)deserializer.Deserialize(reader);

                if (ModelState.IsValid)
                {
                    msg.StatusCode = HttpStatusCode.OK;
                }
                else
                {
                    msg.StatusCode = HttpStatusCode.BadRequest;
                }
            }
            catch (Exception exc)
            {
                msg.StatusCode = HttpStatusCode.BadRequest;
            }
            return msg;
        }

And none of the validation is working. Please advice