[jQuery] Jquery UI Slider Events not raised

[cartic]

OK.. Here is the problem. I have downloaded the UI slider from Jquery
website. The slider shows up fine. The slider moves fine.. BUT.. none
of the callbacks are being called. i have searched high and low for
this but oculd not find anything.

Here is the code that i use
        <script src="js/jquery/jquery-1.3.1.js" type="text/javascript"></
script>
        <script src="js/jquery/ui_core_slider.js" type="text/javascript"></
script>
        <script type="text/javascript">
                $(document).ready(function(){
                        $('#slider_callout').hide();
                        $('#slider1_bar').slider({
                                handle: '.slider_handle',
                                stop: function (e, ui) {
                                        console.log( "stopped" );
                                }
                        });
                });
        </script>
<!--- OTHER HTML HERE --->
                <div class='slider_bar' id="slider1_bar">
                        <div id="slider_callout"></div>
                        <div id='slider1_handle' class='slider_handle'></div>
                </div>

Thanks
Cartic