I getting this error, but when I put breakpoint at my server side code nothing coming through!! When I created little HTML page with file upload filed to same servlet location - IT WORKS!
I used "Live HTTP headers" to see activity on HTTP requests - nothing.... nothing going through, also I used Wireshark - same effect. So what is going on ? any Ideas? AS code is extremely simple: var request:URLRequest = new URLRequest(); request.url = UPLOAD_URL; fr.upload(request); fileNameLabel.text = fr.name;

