If that's all of your HTML, then you're missing a whole bunch of CSS files, etc. Could you share a JS fiddle or longer code example? The way you're not getting any JS errors implies to me you may well be missing some CSS. Also, what version of Lungo are you using? How did you obtain it?
Lots of questions :) However, I created a basic Lungo JSfiddle a while ago - http://jsfiddle.net/otupman/vz59n/ - try that and see if it works. In the "External Resources" section you'll find the CSS & JS I'm including to make it work.
The simple code I'm using (as S/O won't let me post a JSFiddle link without code) simply looks like this:
<section id="main" >
<header data-title="JsFiddle Lungo">
<nav class="left">
<a data-icon="home"></a>
</nav>
</header>
<article class="active" id="first_article">
<strong>Simple Example</strong>
<a href="#second_article" data-router="article">Second article</a>
<br/>
<a href="#second_section" data-router="section">Second section</a>
</article>
<article id="second_article">
<strong>Second article</strong>
<a href="#first_article" data-router="article">First article</a>
<br/>
<a href="#second_section" data-router="section">Second section</a>
</article>
</section>
All of the CSS/JS files are coming from Lungo's example, for example, one CSS is http://lungo.tapquo.com/example/components/lungo/lungo.css