AS1 and PHP

Hello folks,

I have an as1 swf that loads an xml file. It's actually a component inside of it that lodas a file called "config.xml" . I wanted it to be dynamic so I've created a php that would returns the xml.

But then I get an error (invalid xml file)

Code:

---

FFlippingBookCache.prototype.onXMLComplete = function(success) {
        if (success && this.status == 0) {
                this._parentObj._baseObject._onXMLComplete();
        } else if (this.status != 0) {
                trace(this._parentObj._const.INVALID_XML_MSG);
        }

---

Well I don't understand very well what's going on here, cause that's an open source flip book i've found on the web...

So, is it an issue with AS1? Can I do something about it?
Thanks in advance!