Problems with JsonP

[max2014]

Hello,

I'm new to Sencha Architect. I try to read json data from a web server and want to popuplate a list with that.
So I created a JsonP store, because I read that this one should be used if the application doesn't run on the same domain. Next I created a Model and linked it to the store. Finally I updated the list template.
If I use dummy data, it works fine. But the server request (which delivers the same data) doesn't work. The following message appears: "Unable to load data using the supplied configuration."

Here's the generated Code:

Store:

Ext.define('GastroApp.store.TablesStore', {
    extend: 'Ext.data.Store',

    requires: [
        'GastroApp.model.TableModel',
        'Ext.data.proxy.JsonP',
        'Ext.data.reader.Json'
    ],

    config: {
        autoLoad: true,
        model: 'GastroApp.model.TableModel',
        storeId: 'TablesStore',
        proxy: {
            type: 'jsonp',
            url: 'http://kunde.sg-multimedia.de/gastro/json.php',
            reader: {
                type: 'json'
            }
        }
    }
});

Model:

Ext.define('GastroApp.model.TableModel', {
    extend: 'Ext.data.Model',

    requires: [
        'Ext.data.Field'
    ],

    config: {
        fields: [
            {
                name: 'uid',
                type: 'int'
            },
            {
                name: 'name',
                type: 'string'
            },
            {
                name: 'nummer',
                type: 'string'
            }
        ]
    }
});

What am I doing wrong?

[Mthor]

to me when I go to that url, I do not get valid JSON.

also might need to add a root to the proxy.

http://jsonformatter.curiousconcept.com/