onPress function usage!

Hi, i designed a button in flash, and i want it to get some forms variables to send it a anything.php file that make a query to a mysql server and im having problems with the button im using this code , but nothing happens when i test it on the server:

on (press) {
function doSubmit() {
userData = new LoadVars();
userData.id = id;
userData.fecha = fecha;
userData.hora = hora;
userData.destinatario = destinatario;
userData.apellido = apellido;
userData.nombre = nombre;
userData.telefono = telefono;
userData.mail = mail;
userData.receptor = receptor;
userData.mensaje = mensaje;
userData.send("inserta.php", "", "post");
}
}

any hint??
Thanks

yourButtonName.onPress = function() {
...
}