loadVariables in a child


I have a little flash plugin, which is a form to submit the user’s mail address to a database for receiving a newsletter.
The flash contains a dynamic textbox where the user enters his mail address, which has the variable-name “u”. The code must also send the newslettername (variable “l”) and the command (variable “cmd”).
The code for the submit-button looks like this:

Source code

var cmd = “subscribe”;
var l = “office”;
mailform = “admin/u.php”;

When I load the swf alone in the browser, it sends the data perfectly to the php database. When the swf is loaded into another movie (as a child), nothing works, it appears but it doesn’t send data.

Could somebody give me a solution WHY it doesn’t send anything to PHP??