ActionScript 3.0 :: Events Not Firing For Timeline Preloader In IE

This is problem is cropping up in Flash CS3 rather than Flex, but it's Actionscript 3.If you paste the code below into the main timeline on frame 1 and test it in Flash, the COMPLETE and INIT events both fire. And in Firefox and Safari it works too. INIT and COMPLETE both fire. But in IE (6 and 7, both with the latest flash player) on a PC only the INIT event fires.

Code:
var debugText:TextField = new TextField()
addChild(debugText)
var onRootLoaderInit = function (event:Event):void{
debugText.text += "INITIATED." + " "
} var onRootLoaderComplete = function (event:Event):void{
debugText.text += "COMPLETE." + " "
} loaderInfo.addEventListener(Event.INIT, onRootLoaderInit);
loaderInfo.addEventListener(Event.COMPLETE, onRootLoaderComplete);