FileReference upload failure

Question

Hi, I got a FileRefrence instance for a simple upload and it did work for some time in the past, but now I just can't discover what made it stop woking. Can anyone help me find it out? To simplify, I took only the necessary code (not working as the full version). Here are some details:
1. I'm using Flash Player 9 (this can't change because it is a part of a bigger project). My current host machine is a Windows Vista one. The sandbox is set to network access.
2. The FileReference calls a simple php script hosted at an Apache server (Linux). The script permissions are set to 644 (it works for file uploads coming from plain html pages) and I set the folder permission to 777 just to avoid any other source of errors. Here is the simple code for the php script:
<?php
// receiving variables
$uid = trim($_POST['uid']); // just to check for a post variable that  I must send while uploading (won't work even if I revome it)
// a file to check if the script is really called
$myfile = fopen("upload.txt", "wb");
fputs($myfile, "file upload for uid $uid\n");
// receiving the file and saving it
if ($_FILES['Filedata']['name'] != "") {
    $newName = preg_replace('/[^a-z0-9_\-\.]/i', "_", $_FILES['Filedata']['name']);
    $newName = preg_replace('[ \f\r\t\n]', "_", $newName);
    @move_uploaded_file($_FILES['Filedata']['tmp_name'], $newName);
    fputs($myfile, ("new received filename: " . $newName . "\n"));
} else {
    fputs($myfile, ("no file received\n"));
fclose($myfile);
?>
This script writes a file named "upload.txt" so I know it was really called. If I run it directly from the browser, everything is ok.
3. My AS3 code just starts the browsing for a file (I'm using a 500k mp3 to test). By following the program trace I see that the upload actually happens, but when it finishes, I get an IO error (I'm using the very same url address for the script that I use at the browser). When I check the server, I see that no "upload.txt" file is written, so the script was really not found. Here is some of the AS3 code I'm using:
private var urlSend:URLRequest = new URLRequest("my address to the php script (http)");
private var urlData:URLVariables = new URLVariables();   
private var fileTansfer:FileReference = new FileReference();
private function uploadFile():void { // call by a button click
     this.urlData.uid = "1";
     this.urlSend.method = URLRequestMethod.POST;
     this.urlSend.data = this.urlData;
     this.configureListeners(this.fileTansfer); // all listeners are correctly set
     this.fileTansfer.browse(new Array(new FileFilter("Audio files", "*.mp3")));
// listeners set here
private function selectHandler(event:Event):void {
     var file:FileReference = FileReference(event.target);
     trace("selectHandler: name=" + file.name + " URL=" + this.urlSend.url); // prints correclty
     file.upload(this.urlSend);
As I said before, I get traces from progress handler and when it reaches the end, I get the IO error message:
ioErrorHandler: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2038: Erro do arquivo de E/S. URL: (my correct url here)"]
Just for checking I add a Loader instance and used its "load" method with the same "urlSend" variable. It worked and the php script generated the output file...
Does anyone know what's happening? Could it be some permission problem? Why can't the FileReference find my script assuming its url is ok?
Thank you in advance!

Answer 1

How did you resolve the above error ? Thanks.