Extanding the CI_Controller ot working

[eluser]YahyaKACEM[/eluser]
still not working now it gives me 2 new warnnings:

include_once(application/core/MY_Controller.php): failed to open stream: No such file or directory

include_once(): Failed opening 'application/core/MY_Controller.php' for inclusion (include_path='.:/var/www/ZendFramework/library')

no idea what that means and the application/core/MY_Controller.php exsists and it's readable.