openofficeを使ってofficeをpdfに変換していますが、コンポーネントが使用できません。助けてください。

function MakePropertyValue($name,$value,$osm){  <br />
	$oStruct = $osm->Bridge_GetStruct("com.sun.star.beans.PropertyValue");  <br />
	$oStruct->Name = $name;  <br />
	$oStruct->Value = $value;  <br />
	return $oStruct;  <br />
}<br />
<br />
function word2pdf($doc_url, $output_url){  <br />
	$osm = new COM("com.sun.star.ServiceManager") or die ("Please be sure that OpenOffice.org is installed.n");  <br />
	$args = array(MakePropertyValue("Hidden",true,$osm));  <br />
	$oDesktop = $osm->createInstance("com.sun.star.frame.Desktop");  <br />
	$oWriterDoc = $oDesktop->loadComponentFromURL<br />
	($doc_url,"_blank", 0, $args);  <br />
	$export_args = array(MakePropertyValue<br />
	("FilterName","writer_pdf_Export",$osm));  <br />
	$oWriterDoc->storeToURL($output_url,$export_args);  <br />
	$oWriterDoc->close(true);  <br />
}<br />
<br />
$output_dir = "D:/APMServ5.2.6/www/htdocs/pdf/";  <br />
$doc_file = "D:/APMServ5.2.6/www/htdocs/doc/abc.doc";  <br />
$pdf_file = "abc.pdf";  <br />
$output_file = $output_dir . $pdf_file;  <br />
$doc_file = "file:///" . $doc_file;  <br />
$output_file = "file:///" . $output_file;<br />
<br />
word2pdf($doc_file,$output_file);