ACL Ressource (Controller)

Question

i just implemented ACL in my Zend Framework which already uses Zend Auth.

I want to give access to some controllers and tried it this way:

$roleGuest = new Zend_Acl_Role('guest');
$this->addRole($roleGuest);

$this->addRole(new Zend_Acl_Role('supplier'));
$this->addRole(new Zend_Acl_Role('admin'));

$this->add(new Zend_Acl_Resource('Articles'));
$this->add(new Zend_Acl_Resource('Index'));

$this->deny();

$this->allow('supplier', 'Articles');

$this->allow('admin', null);

But a user, who is supplier (he is really :)) is not able to see the Controller Articles. What am I doing wrong?

Thanks for help.

BR frgtv10