No MediaTypeFormatter available on Windows 2003 Server

I have a pretty simple ApiController that works fine on Win7, but on Windows 2003 Server I get an error.

Request for receipt (from browser or $ .getJson):

https://site.com:61656/AD/Authenticate?UserName=xxxx&Password=xxxxx&AuthKey=xxxxxx

I get the following error:

<Exception xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/System.Web.Http.Dispatcher">
<ExceptionType>System.InvalidOperationException</ExceptionType>
<Message>
No MediaTypeFormatter is available to read an object of type 'InputModel' from content with media type ''undefined''.
</Message>
<StackTrace>
at System.Net.Http.HttpContentExtensions.ReadAsAsync[T](HttpContent content, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger) at System.Web.Http.ModelBinding.FormatterParameterBinding.ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger) at System.Web.Http.ModelBinding.FormatterParameterBinding.ExecuteBindingAsync(ModelMetadataProvider metadataProvider, HttpActionContext actionContext, CancellationToken cancellationToken) at System.Web.Http.Controllers.HttpActionBinding.<>c__DisplayClass1.<ExecuteBindingAsync>b__0(HttpParameterBinding parameterBinder) at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext() at System.Threading.Tasks.TaskHelpers.IterateImpl(IEnumerator`1 enumerator, CancellationToken cancellationToken)
</StackTrace>
</Exception>

I use nuget overnight packages on 5/1/2012. It looks like the objectContent.Value object goes through null on Windows 2003 Server, but not on Windows 7 in the following line in HttpContentExtensions.cs:

        if (objectContent != null && objectContent.Value != null && type.IsAssignableFrom(objectContent.Value.GetType()))
        {
            return TaskHelpers.FromResult((T)objectContent.Value);
        }

Controller action:

    [AcceptVerbs("GET", "POST")]
    public ResultModel Authenticate(InputModel inputModel)
    {
        var test = ControllerContext.Request.Content.Headers.ContentType;
        //Console.WriteLine(test.MediaType);
        try
        {
            Console.WriteLine("AD Authorize request received: " + inputModel.UserName);
            var ldap = new LdapAuthentication();
            return ldap.Authenticate(inputModel);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            return new ResultModel();
        }
    }

MediaType comes with a null value in Win7, but on a Windows 2003 server, the request never gets into the controller.

, "undefined"?

EDIT:

:

public class InputModel {

    public string UserName { get; set; }
    public string Password { get; set; }
    public string AuthKey { get; set; }
}

(self host):

        var config = new HttpsSelfHostConfiguration(ConfigurationManager.AppSettings["serviceUrl"]);

        config.IncludeErrorDetailPolicy = IncludeErrorDetailPolicy.Always;
        config.Routes.MapHttpRoute("default", "{controller}/{action}");

        var server = new HttpSelfHostServer(config);

        try
        {
            server.OpenAsync().Wait();
            Console.WriteLine("Waiting...");

№ 2:

Win7 Windows 2003 Server. InputModel , Win7, Windows 2003 Server. Win7 JSON GET POST. Windows 2003 Server XML GET JSON POST.

InputModel POST. , , InputModel Windows 2003 Server, POST. , GET. jQuery $.getJSON Windows 2003 Server:

[AcceptVerbs("GET")]
public ResultModel Authenticate()
{

    try
    {
        var inputModel = new InputModel();
        var query = ControllerContext.Request.RequestUri.ParseQueryString();
        inputModel.UserName = query.GetValues("UserName") != null ? query.GetValues("UserName")[0] : null;
        inputModel.Password = query.GetValues("Password") != null ? query.GetValues("Password")[0] : null;
        inputModel.AuthKey = query.GetValues("AuthKey") != null ? query.GetValues("AuthKey")[0] : null;
        Console.WriteLine("AD Authorize request received: " + inputModel.UserName);
        var ldap = new LdapAuthentication();
        return ldap.Authenticate(inputModel);
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message);
        return new ResultModel();
    }
}