Your JS/CSS linked files are still returning 404. Here is how to setup you links (just copy these and replace your current ones):
JS:
<!-- jQuery -->
<script type="text/javascript" src="http://www.britishsteam.com/smartmenus/libs/jquery/jquery.js"></script>
<!-- SmartMenus jQuery plugin -->
<script type="text/javascript" src="http://www.britishsteam.com/smartmenus/jquery.smartmenus.js"></script>
CSS:
<!-- SmartMenus core CSS (required) -->
<link href="http://www.britishsteam.com/smartmenus/css/sm-core-css.css" rel="stylesheet" type="text/css" />
<!-- "sm-mint" menu theme (optional, you can use your own CSS, too) -->
<link href="http://www.britishsteam.com/smartmenus/css/sm-mint/sm-mint.css" rel="stylesheet" type="text/css" />
IMPORTANT: I saw the “sm-mint.css” file is missing in its default location – not sure where it is right now on your server. You should find it and put it in the following folder on your server:
/smartmenus/css/sm-mint/