Populating MX:Tree with Directory Structure using PHP

Hello,
I have written the following php function to return the directory structure :
     public function get_dir_iterative()
          $dir = 'data';
          $exclude = array( 'cgi-bin', '.', '..' );
          $folders = '<?xml version="1.0"?>';
          $folders .= "<node label='Root' path=\"data\">";
          //$folders .= $this->getFolderRecuring("data");
          $exclude = array_flip($exclude);
          $dh = opendir($dir);
          //$stack = array($dh);
          //$level = 0;
                    //closedir(array_shift($stack));
          while(count($stack))
               if(false !== ( $file = readdir( $stack[0] ) ) )
                    if(!isset($exclude[$file]))
                         if(is_dir($dir . '/' . $file))
                              $dh = opendir($dir . '/' . $file);
                              if($dh)
                                   $folders .= "<node label=\"$file\" path=\"$dir/\" isBranch=\"true\" />";
                                   array_unshift($stack, $dh);
                                   ++$level;
                         else
                              $folders .= "<node label=\"$file\" path=\"$dir/\">";
               else
                    closedir(array_shift($stack));
                    --$level;
          $folders .= "</node>";
          return $folders;
When I test this function manually it returns the proper structure.
But when I call it with help of ZendAMF there is nothing returned and the sandclock is spinning infinite ?!
here is the flex part:
private var fms:RemoteObject = new RemoteObject();
protected function initFileManagerService():void
     fms.destination ='zend';
     fms.source='FileManagerService';
     fms.showBusyCursor=true;
     fms.addEventListener( FaultEvent.FAULT, faultListener);
     fms.get_dir_iterative.addEventListener( ResultEvent.RESULT, load_result );
     trace('FileManagerService initialized');
public function load():void
     fms.get_dir_iterative();
     trace('Service / load');
     private function load_result( e:ResultEvent ):void
          trace('result:'+e.result)
My zend setup is working, any idea what could be wrong ?

>if you comment out the php and just return "hello" do you get it back in flex?
Jip, thats working
>is this line right?>fms.get_dir_iterative.addEventListener( ResultEvent.RESULT, load_result );
Yes it is correct, thats the way you listen for a result of a specific function when using the zend framework.
I have other projects running very good like this.

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