Dynamic Form ---- How to define mx:model or Param/value

Question

I have created a dynamic Form reading input type from
external .xml file. Does anyone have advice concerning sending the
form data to an external .jsp or .php file without knowing what
your <mx:Model> will be? Whenever I try to write:
<mx:Model>
<root>
<q1>data</q1>
<q2>data</q2>
</root>
</mx:Model>
I receive this error: 1120:Access of undefined property
event. I am sure this is because the form elements are created
using actionscript and not within mxml.
I also tried sending it within actionscript using the
send.data(param) like this, same error:
var service:HTTPService = new HTTPService();
//service.contentType = 'application/xml'
service.resultFormat = 'e4x';
//service.destination = 'DefaultHTTP';
service.url = 'URL removed';
service.method = "POST";
service.addEventListener("result",handle_loginResult);
service.addEventListener("fault",handle_loginfault);
var o:Object = new Object();
o.q1 = event.q1;
o.q2 = event.q2;
service.send(o);
Example
of the Application with elements rendered
If you would like to see the complete code:

Answer 1

What are you expecting "event" to refer to?
Put an id on your Model tag, then you can use it to reference
the data.
Note, mx:Model builds a tree of dynamic objects. You will be
happier in the long run if you use mx:XML instead.
Tracy