The javascript console shows this error:
Uncaught TypeError: Object # has no method 'easeInQuart'
Which means you are not importing the jQuery UI library which is needed by the plugin as specified in the documentation.
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.9.1/jquery-ui.min.js"></script>
Also, you have problems in your HTML markup as you can see highlighted in red here.
If you do not want to include the whole jquery UI library for just that single effect, you can use the easings file provided by fullPage.js that includes all of the jquery UI easings.