I work for a project of mobile application with sencha touch, and I have a problem with my models to retreive informations. i will show you my model and my json file content


json file : ( i make it very simple just to test, i deleted the geometry line)

Code:
{
        "type": "FeatureCollection",
        "features": [
            {
            "properties": {
                           "graphic": "img/restaurant.png",
                             "Name": "Igor Tihonov",
                            "Country":"Sweden", 
                             "City":"Gothenburg"}
            }


        ]
}
My model :

Code:
Ext.regModel('Features', {
        hasMany: {model: 'Properties', name: 'properties'}


    });




    Ext.regModel('Properties', {
        fields: ['graphic', 'Name', 'Country', 'City'],
        associations: [
            {type: 'belongsTo', model: 'Features'}
        ]
    });
Store :
Code:
 Ext.data.Store({        model: 'Features',
        proxy: {
            type: 'ajax',
            url : 'poi2.json',
            reader: {
                type: 'json',
                rootProperty: 'features'
            }
        },
        autoLoad:true 
    });
i have more than a week since i'm blocked, i wish that you could help me ! thank you