为什么这个jquery滚动条插件无法在我的网站上运行？

Question

插件的链接：

http://www.myjqueryplugins.com/jquery-plugin/jscrollbar

正如他们所说我刚下载的文件已上传到我的网站。 然后我嵌入了html并添加了这段代码：

<!-- include CSS & JS files -->
<!-- CSS file -->
<link rel="stylesheet" type="text/css" href="http://newsxpressmedia.com/files/theme/jScrollbar.jquery.css" media="screen" />
<!-- jQuery files -->
<script type="text/javascript" src="http://newsxpressmedia.com/files/theme/jquery.js"></script>
<script type="text/javascript" src="http://newsxpressmedia.com/files/theme/jquery-ui.js"></script>
<script type="text/javascript" src="http://newsxpressmedia.com/files/theme/jquery-mousewheel.js"></script>
<script type="text/javascript" src="http://newsxpressmedia.com/files/theme/jScrollbar.jquery.js"></script>
<!-- Main container -->
<div class="jScrollbar">
    <!-- Scrolling content container -->
    <div class="jScrollbar_mask">
        <p>
        <!-- Your long content here -->
        Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi...dfdfdsfdfddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd
        </p>
    </div>
    <!-- slider container -->
    <div class="jScrollbar_draggable">
        <!-- slider -->
        <a href="#" class="draggable"></a>
    </div>
    <!-- don't forget to clear the floats -->
    <div class="clr"></div>
</div>
<script type="text/javascript">
    $(document).ready(function(){
    // simple jScrollbar plugin call
    $('.jScrollbar').jScrollbar();
    // more complex jScrollbar plugin call
    $('.jScrollbar').jScrollbar({
        scrollStep : 25,
        position : 'left',
        showOnHover : true
    });
});
</script>

但我所看到的只是文字：

Lorem ipsum dolor坐下来，精神上的精神。 Morbi ... dfdfdsfdfddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd

我没有看到任何滚动条 这些文件的链接很好，就像我正在使用其他有效的jquery插件一样。