Errors when wan to use the Forum

When i want to enter the Forum in Adminpanel or normaly this comes:
Warning: require_once(/var/www/xxxxxxx/modules/boonex/forum/layout/standart/params.php) [function.require-once]: failed to open stream: Permission denied in /var/www/virtual/3x-com.de/htdocs/modules/boonex/forum/integrations/base/config.php on line 97

Fatal error: require_once() [function.require]: Failed opening required '/var/www/xxxxxxxx/modules/boonex/forum/layout/standart/params.php' (include_path='.:/usr/share/php:/usr/share/pear') in /var/www/virtual/3x-com.de/htdocs/modules/boonex/forum/integrations/base/config.php on line 97