Running Joomla 2.5.24
php 5.2.17

If I change the site template over to Twilight, I get the following error message when I try to browse to it:-

Warning: require(/homepages/30/d43044698/htdocs/usaf-sig/jupgrade/modules/mod_articles_news/tmpl/vert.php) [function.require]: failed to open stream: No such file or directory in /homepages/30/d43044698/htdocs/usaf-sig/jupgrade/modules/mod_articles_news/mod_articles_news.php on line 18

Fatal error: require() [function.require]: Failed opening required '/homepages/30/d43044698/htdocs/usaf-sig/jupgrade/modules/mod_articles_news/tmpl/vert.php' (include_path='.:/usr/lib/php5') in /homepages/30/d43044698/htdocs/usaf-sig/jupgrade/modules/mod_articles_news/mod_articles_news.php on line 18

Line 18 of mod_articles_news.php is:-

require JModuleHelper::getLayoutPath('mod_articles_news', $params->get('layout', 'horizontal'));

Can anyone help here? The site works fine with the beez2 default template, so I guess that the error is something to do with the Twilight template itself?

Many thanks,

Chris