Can't parse a return string from JsonP!

[neobach]

Hi guy,
I have made a request of JsonP, but the return string can't parse. I don't know why?
I'm using Sencha touch 2.0.1.1, webservice: attach file, browser: Safari: 5.1.7, OS: window 7.
This is my code (copy from JsonP example, but the url is my web service):

Ext.Viewport.add({
    xtype: 'button',
    text: 'Make JsonP Request',
    centered: true,
    handler: function(button) {
        // Mask the viewport
        Ext.Viewport.mask();


        // Remove the button
        button.destroy();


        // Make the JsonP request
        Ext.data.JsonP.request({
            url: 'http://localhost:7794/GetEmployees.svc/json/hello',
            callbackKey: 'callback',
            success: function(result, request) {
                // Unmask the viewport
                Ext.Viewport.unmask();
            }
        });
    }
});

This is a error:
json-fail.jpg

json-fail-detail.jpg

What's a trouble? The string is a json string. But why it can't read it?
Please help me to solve it, thanks!

[mitchellsimoens]

That's because your response is only JSON not JSONP. Sample JSONP is

Ext.data.JsonP.callback01({"success": true});

[neobach]

Hi mitchellsimoens,
May you share me a sample jsonP string? It's so good if there is a sample of web service that return a jsonP string.
I have tried to return a string like:

{"helloResult":"Ext.data.JsonP.callback1({sucess:true})"}

But it's still not work.
Thanks so much

[neobach]

Hi, I have solved my trouble, we must config to WCF return the string in jsonP format.
Thanks.