CakePHP Newbie about dropdown

Hi All,

I have two controllers: courses and providers defined as:
class CoursesController extends AppController {
var $name='Courses';
var $uses=array('Courses','Providers');
var $belongsTo = array('Provider' =>
array('className' => 'Provider',
'conditions' => '',
'order' => '',
'foreignKey' => 'provider_id'
));

class ProvidersController extends AppController {
var $name='Providers';
var $hasMany=array('Course');

in the add function at the CoursesController I have:
function add() {
if (!empty($this->data)) {
if ($this->Course->save($this->data)) {
$this->flash('Your Course has been saved.', '/courses');
}
} else {
$this->set('providers', $this->Course->Provider->generateList());

$this->render();
}
}

and at the view for the add I have:
echo $form->create('Course');
echo $form->input('name');
echo $form->input('provider_id');
$html->selectTag('Course/provider_id', $providers, $html->tagValue
('Course/provider_id'), array(), array(),false, true)));
echo $form->end('Save Post');

The problem then getting into the /add is:

Notice (8): Undefined property: CoursesController::$Course [APP
\controllers\courses_controller.php, line 32]
Notice (8): Trying to get property of non-object [APP\controllers
\courses_controller.php, line 32]

Fatal error: Call to a member function generateList() on a non-object
in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\app
\controllers\courses_controller.php on line 32

the line 32 is: $this->set('providers', $this->Course->Provider-
>generateList());

I have read several samples and it looks I am doing the right thing,
but something it's missing!

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