Hello, I'm having problem handling STORY_POINT_SWITCH event.

I've a web page that instantiate viz object and load a story.

I want to catch user interaction with Story Point navigation bar.

This is the code I'm using:

<script type="text/javascript" src="<my-tableau-server-url>/javascripts/api/tableau-2.min.js"></script>

<div class="panel-body">

    <div id="tableauViz"></div>

</div>

<script>

    var viz, sheet, storypoints;

    function createViz(data) {

        var vizDiv = document.getElementById("tableauViz"),

        var options = {

                hideTabs: true,

                hideToolbar: true,

                onFirstInteractive: function () {

                    var storyPointSwitchHandler = function (event) {

                        console.log('storyPointSwitchHandler : ', event);

                    };

                    viz.addEventListener(tableau.TableauEventName.STORY_POINT_SWITCH, storyPointSwitchHandler);

                }

        };

        if (viz) {

             viz.dispose();

        }

        var vizURL = '<my-view-trusted-url>';

        viz = new tableauSoftware.Viz(vizDiv, vizURL, options);

    }

    function loadView() {

        $.ajax({

                type: "GET",

                url: "<url-that-give-me-a-token>",

                data: <parameters-for-url-above>,

                dataType: "json",

                success: function (response) {

                    if (response.Status > 0) {

                        createViz(response);

                    }

                }

         });

    }

    loadView();

</script>

View load correctly and I can navigate through the Story Points but the Event Listener not works at all

Any help?

Thank you in advance

Stefano