Problems loading usercontrol with parameters via AJAX

Hi,

I'm using the following js script to load a usercontrol via AJAX, but i keep getting the error bellow:

function LoadContribution(Id, divId) {

            alert('teste2');

            var data = {};
            data.Id = Id;

            $.ajax({
                url: 'myPage.aspx/LoadExtendedDetail',
                method: 'POST',
                dataType: "json",
                contentType: 'application/json',
                data: JSON.stringify(data)
            }).done(function (response) {
                alert("teste 3");
                console.log(response);$('#' + divId).html(response.d);

            }).fail(function (err) {
                console.log(err);
            });

        }

<System.Web.Services.WebMethod()>
    Public Shared Function LoadExtendedDetail(ByVal myId As String) As String
        'Thread.Sleep(2000)

        ExceptionUtility.LogInfo("myId : " & myId )

        Using page As New Page

            Dim userControl As UserControl = DirectCast(page.LoadControl("App_Controls/ExtendedDetail.ascx"), UserControl)

            'userControl.myId = myId

            Using writer As New StringWriter()

                page.Controls.Add(userControl)

                HttpContext.Current.Server.Execute(page, writer, False)

                Return writer.ToString()

            End Using

        End Using

    End Function

"{"Message":"An attempt was made to call the method \u0027LoadContributionExtendedDetail\u0027 using a GET request, which is not allowed.","StackTrace":"   at System.Web.Script.Services.RestHandler.GetRawParams(WebServiceMethodData methodData, HttpContext context)\r\n   at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)","ExceptionType":"System.InvalidOperationException"}"

The LoadContribution function is called when i press a link and the the error above is fired

I also can't understand why the error detail keeps pointing to a GET request when i have the AJAX code set to use POST...

I've also attempted to change the instantiation of the usercontrol within the webmethod to

Dim userControl As App_Controls_ExtendedDetail = DirectCast(page.LoadControl("App_Controls/ContributionExtendedDetail.ascx"), App_Controls_ExtendedDetail)

and i have the App_Controls_ExtendedDetail control registered on the aspx page, but i keep getting an error stating that the control is ambiguous.

Any ideia how to solve these two issues?