My web server runs at http://mypc.com:80 `

Given the following snip:

$(window).load(function () {
    var myURL = "http://mypc.com:8000/PSOCharts/service/HighChart_ColumnChart/i";


    $.getJSON(myURL)
        .done(function(data) {alert(data);});

    });

I am running to this error:

XMLHttpRequest cannot load http://mypc.com:8000/PSOCharts/service/HighChart_ColumnChart/i. Origin http://mypc.com is not allowed by Access-Control-Allow-Origin.

I understand why (I think) b/c my webservice runs at port 8000 which is different from what IIS is running on (port 80).

I thought I could get around by using jsonp (according to the jQuery documentation here

So I copied the example of making a call to the flickr api, but it isnt working. Any thoughts/sugggestions?

UPDATE

Ok so my request is being made now:

var myURL = "http://192.168.1.104:8000/PSOCharts/service/HighChart_ColumnChart/i?jsoncallback=?";

    $.ajax({
        url :myURL,
        dataType: "jsonp",
        success: function(data) {a(data)} ,
        error: function(){alert("err");},
        });

But I am continually hitting the error function, here is what's being returned:

[1.4,54.43,49.39,93.23]

Now I'm assuming this is b/c the response text doesnt contain any type of callback

here is the part of the interface I'm calling:

 [WebInvoke(Method = "GET",
        RequestFormat = WebMessageFormat.Json,
        ResponseFormat = WebMessageFormat.Json,
        UriTemplate = "HighChart_ColumnChart/{id}?callback={cb}")]
    List<double> HighChart_ColumnChart(string id,string cb);

Here is the actual function being called:

  public List<double> HighChart_ColumnChart(string id,string cb)
    {
        var z = new List<double>();
        z.Add(1.4);
        z.Add(54.43);
        z.Add(49.39);
        z.Add(93.23);
        return z;
    }

when I debug, the CB param is something like : "jQuery19108121746340766549_1372630643878". How do I modify the code to wrap it correctly? Thanks for the help thus far!