Invalid RU ($currentUri)

<?php 
  G::LoadClass ( 'jasperReports' ); 
  $oJasper = new jasperReports( '192.168.0.51', 8080, 'jasperadmin', 'jasperadmin' );

  $response = $oJasper->ws_list("/");

  if (is_object($response) && get_class($response) == 'SOAP_Fault') {
    $errorMessage = $response->getFault()->faultstring;
  }
  else {
    $folders = $oJasper->getResourceDescriptors($response);
  }

 //$result = $oJasper->ws_put();
 krumo ($response);
 
  //execute a report 
  
  $currentUri = "/reports/samples/Employees";
  $result = $oJasper->ws_get($currentUri);

  $folders = $oJasper->getResourceDescriptors($result);
 
  if (count($folders) != 1 || $folders[0]['type'] != 'reportUnit')
  {
     echo "<H1>Invalid RU ($currentUri)</H1>";
     echo "<pre>$result</pre>";
     exit(); 
  }

  $reportUnit = $folders[0];
  
  // 2. Prepare the parameters array looking in the $_GET for params
  // starting with PARAM_ ...
  //
 
  $report_params = array();
 
  $moveToPage = "jasper?uri=$currentUri";
 
  foreach (array_keys($_GET) AS $param_name) {
    if (strncmp("PARAM_", $param_name,6) == 0) {
      $report_params[substr($param_name,6)] = $_GET[$param_name];    
    }
  
//    if ($param_name != "page" && $param_name != "uri") {
//      $moveToPage .= "&".urlencode($param_name)."=". urlencode($_GET[$param_name]); 
//    }
  }
 
  $formatReport = RUN_OUTPUT_FORMAT_XML;
  $formatReport = RUN_OUTPUT_FORMAT_CSV;
  $formatReport = RUN_OUTPUT_FORMAT_RTF;
  $formatReport = RUN_OUTPUT_FORMAT_PDF;
  $formatReport = RUN_OUTPUT_FORMAT_HTML;
  $moveToPage .="&page=";
 
  // 3. Execute the report
  $output_params = array();
  $output_params[RUN_OUTPUT_FORMAT] = $formatReport;
   
  if ( $formatReport == RUN_OUTPUT_FORMAT_HTML) {
    //$pageReport = isset ( $_GET['page'] ) ? $_GET['page'] : 1;
    //$output_params[RUN_OUTPUT_PAGE] = $pageReport;
    //$output_params[RUN_OUTPUT_IMAGES_URI] = '/sysos/'. SYS_LANG. '/classic';
  }
 
  $result = $oJasper->ws_runReport($currentUri, $report_params,  $output_params, $attachments);
 
  // 4. 
  if (is_object($result) && get_class($result) == 'SOAP_Fault') {
    $errorMessage = $result->getFault()->faultstring;
    
    echo $errorMessage;
    exit();
  }
   
  $operationResult = $oJasper->getOperationResult($result);
   
  if ($operationResult['returnCode'] != '0') {
    echo "Error executing the report:<br><font color=\"red\">".$operationResult['returnMessage']."</font>";   
    exit();
  }
 
  if (is_array($attachments))
  {
    //krumo ($attachments);

    switch ($formatReport) { 
      case RUN_OUTPUT_FORMAT_PDF :
        header ( "Content-type: application/pdf" );
        echo( $attachments["cid:report"]);
        break;
      
      case RUN_OUTPUT_FORMAT_HTML :
        // 1. Save attachments....
        // 2. Print the report....
        header ( "Content-type: text/html");
        foreach (array_keys($attachments) as $key) {
          if ($key != "cid:report") {
            $f = fopen("images/".substr($key,4),"w");
            fwrite($f, $attachments[$key]);
            fclose($f);
          }
        }
    
        echo "<center>";        
        $prevpage = ($pageReport > 0) ? $pageReport - 1 : 0;
        $nextpage = $pageReport + 1;
        
        echo "<a href=\"".$moveToPage.$prevpage."\">Prev page</a> | <a href=\"".$moveToPage.$nextpage."\">Next page</a>";
        echo "</center><hr>";
        
        echo $attachments["cid:report"];
        //print_r(array_keys($attachments));
        break;
        
      case RUN_OUTPUT_FORMAT_CSV :   
      case RUN_OUTPUT_FORMAT_XLS :
        header ( 'Content-type: application/xls' );
        header ( 'Content-Disposition: attachment; filename="report.xls"');
        echo( $attachments["cid:report"]);
        break;

      case RUN_OUTPUT_FORMAT_RTF :
        header ( 'Content-type: text/rtf' );
        header ( 'Content-Disposition: attachment; filename="report.rtf"');
        echo( $attachments["cid:report"]);
        break;

      default :
        //header ( 'Content-type: application/xls' );
        //header ( 'Content-Disposition: attachment; filename="report.xls"');
        echo( $attachments["cid:report"]);
        break;
    }   
    exit();   
  } 
  else echo "No attachment found!";