HABTM associations with another table - cakephp

Question

I'm in trouble with a more complex situation of HABTM in Cakephp. Ina nutshel, the situation is: a have users and movies, the relationship between then is HABTM, but i also need a relationship types.
USERS - HABTM - MOVIES
|
RELATION_TYPES
The relationship between users and movies could be many different types: author type, public type, etc.
When i try to use the contain behavior, i get an error message that says:
Model "MoviesUser" is not associated with model "RelationType".
But all the models are associated.
These are the models:
User Model
public $hasAndBelongsToMany = array(
'Movie' => array(
'className' => 'Movie',
'joinTable' => 'movies_users',
'foreignKey' => 'user_id',
'associationForeignKey' => 'movie_id',
'unique' => 'keepExisting',
'conditions' => '',
'fields' => '',
'order' => 'Movie.title',
'limit' => '',
'offset' => '',
'finderQuery' => '',
'deleteQuery' => '',
'insertQuery' => ''
)
);
Movie Model
public $hasAndBelongsToMany = array(
'User' => array(
'className' => 'User',
'joinTable' => 'movies_users',
'foreignKey' => 'movie_id',
'associationForeignKey' => 'user_id',
'unique' => 'keepExisting',
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'finderQuery' => '',
'deleteQuery' => '',
'insertQuery' => ''
)
);
MoviesUser Model
public $belongsTo = array(
'User' => array(
'className' => 'User',
'foreignKey' => 'user_id',
'conditions' => '',
'fields' => '',
'order' => ''
),
'Movie' => array(
'className' => 'Movie',
'foreignKey' => 'movie_id',
'conditions' => '',
'fields' => '',
'order' => ''
),
'RelationType' => array(
'className' => 'RelationType',
'foreignKey' => 'relation_type_id',
'conditions' => '',
'fields' => '',
'order' => ''
)
);
In the MoviesController, i'm trying to get some movies and the relation with users and the type of the relation. Here is where i call the Contain on Movies Controller:
$this->Movie->contain(array(
'Person' => array(
'order' => array(
'Person.name'=>'ASC'
),
'Activity'
),
'Country' => array(
'order'=>array(
'Country.name'=>'ASC'
)
),
'User'=>array(
'conditions'=>array(
'User.id'=>$this->Session->read('Auth.User.id')
),
'MoviesUser'=>array(
'RelationType'
)
)
));
When i try to run this i get the message Model "MoviesUser" is not associated with the model "RelationType".
The fields of movies_user are:
id, user_id, relation_type_id, rate, comment
The fields of relation_types are:
id, title
And here my $has_many property on RelationType Model:
public $hasMany = array(
'MoviesUser' => array(
'className' => 'MoviesUser',
'foreignKey' => 'relation_type_id',
'dependent' => false,
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'exclusive' => '',
'finderQuery' => '',
'counterQuery' => ''
)
);