CakePHP belongsTo not working

CakePHP belongsTo not working

I have a couple of tables in my database:
CREATE TABLE IF NOT EXISTS `team_players` (
`artificialid` int(11) NOT NULL AUTO_INCREMENT,
`team_name_id` int(11) NOT NULL,
`player_id` int(11) NOT NULL,
PRIMARY KEY (`artificialid`)
)
And:
CREATE TABLE IF NOT EXISTS `team_names` (
`id` int(11) NOT NULL,
`name` varchar(50) NOT NULL
)
And I have set up my TeamPlayer model like this:
class TeamPlayerModel extends AppModel {
public $belongsTo = array(
'TeamName',
'Player'
)
);
}
The players table has a field id, but neither of the associations are
working.
I don't really understand why it isn't working, I have something like this
working in another app, pretty much line for line.
Thanks in advance, I really appreciate any help.