Hello,
Does anyone know what this means? when I click on the Catche Controller from my admin menu, nothing happens. I get these messages. Any ideas?

Warning: include(includes/libs/admin_a_cache.module.php) [function.include]: failed to open stream: No such file or directory in /home/mydir/public_html/plentyofit/includes/libs/admin.module.php on line 50

Warning: include(includes/libs/admin_a_cache.module.php) [function.include]: failed to open stream: No such file or directory in /home/mydir/public_html/plentyofit/includes/libs/admin.module.php on line 50

Warning: include() [function.include]: Failed opening 'includes/libs/admin_a_cache.module.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/mydir/public_html/plentyofit/includes/libs/admin.module.php on line 50