No progresss information when downloading

I have a small mp3 player on our band website that have the option for people to download our mixes. Everything work perfect except for one thing. The download is working and the files get downloaded but there's no progress information (progress bar) while the download goes on. The files are 75MB so they do not exceed the 100MB issue. What's going wrong?

Here's the script:


import flash.net.FileReference;
var listener:Object = new Object();

listener.onSelect = function(file:FileReference):Void {
trace("onSelect: " + file.name);
}

listener.onCancel = function(file:FileReference):Void {
trace("onCancel");
}

listener.onOpen = function(file:FileReference):Void {
trace("onOpen: " + file.name);
}

listener.onProgress = function(file:FileReference, bytesLoaded:Number, bytesTotal:Number):Void {
trace("onProgress with bytesLoaded: " + bytesLoaded + " bytesTotal: " + bytesTotal);
}

listener.onComplete = function(file:FileReference):Void {
trace("onComplete: " + file.name);
}

listener.onIOError = function(file:FileReference):Void {
trace("onIOError: " + file.name);
}
var fileRef:FileReference = new FileReference();
fileRef.addListener(listener);

// save button action
saveBut.onPress = function() {
var local:String = file.substr(file.lastIndexOf("/")+1);
fileRef.download(file, local);
trace(local);
};