Actionscript 3.0 :: Looping Through XML Returned From PHP?

I'm creating a registration form that contains a 'chain-select' series of ComboBoxes. In other words, select an item in the first CB and display the results from a mysql query in the next CB.

PHP returns the results in an XML String (Code: Select allecho "returnXML="$returnXML; ). All is working great up to that point. What I would like to do is loop through the Code: Select allXMLList, running Code: Select alldataP.addItem({label: newData}); for each node. The problem is that the Code: Select allXMLList.length(); function is returning a value of 1.

Code: Select allxmlList.hasComplexContent() returns 'true' which, i believe, would indicate that the XMLList is being created successfully.

Here's a bare-bones version of the code that should be sufficient for solving this problem.

AS3:
Code: Select allimport flash.net.*;
import fl.data.DataProvider;
var dataP:DataProvider = new DataProvider();
var newData:String;

[Code]....