No Properties from Ember Data

gistfile1.txt

Problem: The JSON is received from the server, but only the "id" property have a value. The GUI only displays the String "2 1", an the {{photoName}} is ignored. Manually calling MyApp.PhotoController.get('content').objectAt(0).get('photoName') returns "undefined", whereas MyApp.PhotoController.get('content').objectAt(0).get('id') returns the correct ID. 

Any Sugggestions ? 

//My Model:
MyApp.Photo = DS.Model.extend({
	id: DS.attr('number'),
	photoName: DS.attr('string'),
	photoDescription: DS.attr('string'),
	photoFullSizeURL: DS.attr('string'),
	photoThumbnailURL: DS.attr('string')
});

//We are reopening the class so that we can add the URL that the 
//JSON Hash will be received from
MyApp.Photo.reopenClass({
	url: 'photos.json'
});

//My StateManager

MyApp.stateManager = Ember.StateManager.create({
	rootElement: '#mainArea',
	initialState: 'showMainView',

	showMainView: Ember.ViewState.create({
		enter: function(stateManager) {
			this._super(stateManager);
			var photos = MyApp.store.findAll(MyApp.Photo);
			MyApp.PhotosController.set('content', photos);
		},

		view: Em.ContainerView.create({
			childViews: ['photoListView'],

			photoListView: Em.View.extend({
				elementId: 'photoList',
				templateName: 'photo-list-view',
				contentBinding: 'MyApp.PhotosController.content'
			})
		})
	})
})

//My Controller: 
MyApp.PhotosController = Ember.ArrayProxy.create({
	content: []
});

//My template: 

<script type="text/x-handlebars" data-template-name="photo-list-view">
        PHOTOS:<br/>
        {{#each content}} 
            {{photoName}} {{id}}
        {{/each}}
</script>

//JSON Received from server: 

[
	{
		"id": 2,
		"photoName": "Bird Photo",
		"photoDescription": "Bird Photo Description",
		"photoFullSizeUrl": "photos/bird.jpg",
		"photoThumbnailUrl": "photos/bird_thumb.png"
		
	},
	{
		"id": 1,
		"photoName": "Bird Photo 2",
		"photoDescription": "Bird Photo Description 2",
		"photoFullSizeUrl": "photos/bird.jpg",
		"photoThumbnailUrl": "photos/bird_thumb.png"
		
	}
]