'openInfoWindow' Causing an error on Google maps jQuery-ui

Question

I need some help with adding infoWindows on Google maps using jquery-ui-map v3

I am getting the Markers from a MySQL database and i am attempting to add infowindow from the description of each location as stored in the data but i keep getting this error

Uncaught no such method 'openInfoWindow' for gmap widget instance

function initMap(container, pos, zoom) {
    $(container).gmap({
        'center': pos,
        'zoom': zoom,
        'zoomControlOptions': {
            'position': google.maps.ControlPosition.LEFT_TOP
        },
        'callback': function () {
            $.getJSON('backend/addmarkers.php', function (data) {
                $.each(data, function (i, m) {
                    $(container).gmap('addMarker', {
                        'position': new google.maps.LatLng(m.latitude, m.longitude),
                        'icon': 'markers/' + m.cat_img,
                        draggable: false
                    }).click(function () {
                        $(container).gmap('openInfoWindow', {
                            'content': m.description
                        }, this)
                    });
                });
            });
        }
    });
}

Please help me out, in this thing running by monday. I have an academic presentation to make. Thanks