JsonP store and trouble with reader

Having some issues with loading data in my store using JsonP.

I have a facebook page which I need to load my json data from.

http://ift.tt/1fpLy9T

Every time it error out and not able to load my data. I am not sure what is that I am not doing right.

my codes are as follows.

Code:

Ext.define('myApp.store.MyFeedStore', {    extend: 'Ext.data.Store',


    requires: [
        'myApp.model.MyFeed',
        'Ext.data.proxy.JsonP',
        'Ext.data.reader.Json'
    ],


    config: {
        autoLoad: true,
        model: 'myApp.model.MyFeed',
        storeId: 'MyFeedStore',
        proxy: {
            type: 'jsonp',
            url: 'http://ift.tt/1f6cWio',
            callbackKey: 'jsoncallback',
            reader: {
                type: 'json',
                record: 'entries'
            }
        }
    }
});