Question about DropZone and FileReference

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Hi All,

I struggle with drag and drop and upload file to a remote server.
I can upload file using FileReference (_fr), this is working fine :

            private function ev_SelectedFile(e:Event):void {
                var url:URLRequest = new 
URLRequest("http://myserver.com/upload_file.php";)
                url.method = "POST";
                trace ("selected1:" + (e.currentTarget as 
FileReference).fileReference.name);
                trace ("selected2:" + (e.currentTarget as 
FileReference).fileReference.size);                 _fr.upload(url);
            }

Now, instead to be _fr.browse(), I want the source of upload to be a 
drag and drop file.
I have an event working using jewel DropZone when I drop a file, but how 
to setup FileReference ? Here is my buggy code :

 private function ev_dropped(e:DroppedEvent):void {

                trace ("dropped");
                //_fr.fileReference = new File((e.data[0] as 
DroppedModel).fileData.array,"test.mp3");
                _fr.fileContent = (e.data[0] as DroppedModel).fileData;
                var url:URLRequest = new 
URLRequest("http://myserver.com/upload_file.php";)
                url.method = "POST";
                _fr.upload(url),
}

Thank in advance for help
Regards
Fred