Facebook apprequests how to get the return .to and .request?

Using Titanium on iOS

Ok so I used FB.ui() to get an apprequest in my old app that ran on a webserver. Now I'm adding all the functionallity to my iOS app. I'm using the Titanium Facebook library and using the dialog('apprequests',{}); The dialog is working great and I can send invites to friends. My problem is when I try to retrieve the return value of .to and .request from the dialog call. I seen that it actually had the information I needed the request ID and the users ID .to who got invited.

Here's what I use to do on the webserver

var requestID = response.request;
 
//console.log(response);
var arrayString = "";
for (var i = 0; i < response.to.length; i++)
{
arrayString += "&toArray[]="+response.to[i];
}

I'm doing something else with the result just using this as an example, I'm just wondering how to get acces to .to and request I can do an alert(JSON.stringify(response)); and see the values I need but when I try to access them, it gives me errors or a null.

Thanks