OK, in that case then it seems that something, probably your WordPress theme, has hardcoded paths to TubePress's static resources. Specifically, you have references in your HTML source to
<link rel='stylesheet' id='tubepress-css' href='http://www.issarae.com/wp-content/plugins/tubepress/sys/ui/themes/default/style.css?ver=3.5' type='text/css' media='all' />
<script type='text/javascript' src='http://www.issarae.com/wp-content/plugins/tubepress/sys/ui/static/js/tubepress.js?ver=3.5'></script>
I would edit your theme's header.php and replace these paths to the correct locations:
<link rel='stylesheet' id='tubepress-css' href='http://www.issarae.com/wp-content/plugins/tubepress/src/main/web/css/tubepress.css' type='text/css' media='all' />
<script type='text/javascript' src='http://www.issarae.com/wp-content/plugins/tubepress/src/main/web/js/tubepress.js'></script>
Or simply make sure that your theme is correctly calling wp_head().