How Can I get the data from one domain to another domain using ajax jsonp?

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Javascript

EX: My site url "http://localhost:54887/CustomOrdering.html" but I want to get data from another site "http://localhost:27746/Orders.aspx". For this I wrote in CustomOrdering.html

function SessionLogin() {
                   $.ajax({
                       type: "GET",
                       dataType: "jsonp",
                       contentType: "application/json",
                       async: false,
                       url: 'http://localhost:27746/Orders.aspx/SessionLogin',
                       success: function (msg) {
                       },
                       error: function (jqXHR, textStatus, errorThrown) {
                           alert(errorThrown);
                       }
                   });
               }

in Order.aspx

  public  void SessionLogin()
    {
        HttpContext.Current.Response.ContentType = "application/json";
        string qs = HttpContext.Current.Request.QueryString["callback"];
        HttpContext.Current.Response.Write(qs + "( [{ \"x\": 10, \"y\": 15}] )");
    }
}

Showing error " Jquery11110002214477863162756_1449484451326 was not called" . How can I get the result for the above html page from aspx page. Please suggest me it's urgent