loaderinfo Event.COMPLETE not being called infirefox.. sometimes?

Hi guys,

I've createa  simple flash banner (FL10, CS4) that is used stored in multiple locations on a server, which is sent a relative path to an XML file via FlashVars. relative path images are then loaded from this xml file.

the base class for the banner is

Thins all works fine locally and in IE but in Firefox it fails about half the time to trigger the loaderinfo  Event.COMPLETE  call.

why?  this is driving me insane.

(essence of the Base class below:)

public class Banner extends MovieClip {

        public function Banner() {
            this.loaderInfo.addEventListener(Event.COMPLETE, loaderComplete);
        }
        private function loaderComplete($e:Event) {
           
            createDebug();                                        debugMe("init");
           
            var flashVars    = this.loaderInfo.parameters;
            var tNum:uint    = Math.round(100 * Math.random());
            xmlPath    = String(flashVars.xmlFileName)+"?param="+ Math.round(100 * Math.random());            debugMe("xmlPath|" + xmlPath);
           
             init();
        }

}

I've cut out the rest of the methods, but trust me it works perfectly in IE, Chrome etc. just FF.

Any ideas why flash wouldn't initialise, oh.  and if you refresh the page it loads straight away, I can't identify any pattern between locations or order of loading.

regards, Rich