jQuery Uploadify มีปัญหาเกี่ยวกับชื่อไฟล์ภาษาไทย ช่วยดูหน่อยค่ะ

<script type="text/javascript">
$(document).ready
(
	function() 
	{
	  $('#file_upload').uploadify
	  ({  
		'uploader' 		 : 		'../uploadify/uploadify.swf',
		'script'   		 : 		'../uploadify/uploadify_petition.php?id_pet=<?=$_GET['id_pet'];?>',
		'cancelImg'	 : 		'../uploadify/cancel.png',
		'folder'    	 	 : 		'../file_uploaded/petition/',
		'auto'      	 	 : 		false,  
		'multi'		 	 :		true,
		'fileDesc'    	 :		'Images and PDF files only! (JPG, PNG, PDF)', 
        'fileExt'      	 :		'*.pdf;*.jpg;*.jpeg;*.png;',    
		'displayData' 	 :	 	'speed',
		'sizeLimit'		 :		500000,
	  
	   'onAllComplete' : function(event,data) 
		{  
		  	alert(data.filesUploaded + ' files uploaded successfully!');  
			location.reload("index.php?param=m5");
			
		}, 
		
		'onProgress' : function(event,ID,fileObj,data) 
		{
		  var bytes = Math.round(data.bytesLoaded / 1024);
		  $('#' + $(event.target).attr('id') + ID).find('.percentage').text(' - ' + bytes + 'KB Uploaded');
		  return false;
		} 
	   });
	}
);  
</script>

if (!empty($_FILES)) 
{
	$tempFile = $_FILES['Filedata']['tmp_name'];
	$targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/';
	$targetFile =  str_replace('//','/',$targetPath) . $_FILES['Filedata']['name']; 
	
	if(trim($_FILES["Filedata"]["tmp_name"]) != "")
	{
		move_uploaded_file($tempFile,$targetFile);  
		
	 	include('../includes/phpConfig.php');
		Conn2DB();
		include('../includes/dbcharset.inc.php'); 
		
		$sql_id = "SELECT MAX(id_file_pet) FROM file_petition";
		$rss_id = mysql_query($sql_id) or die("ผิดพลาด : ".mysql_error());	 
		$rs_id = mysql_fetch_array($rss_id);
		$id = $rs_id[0]+1;
		
		$path = "../file_uploaded/petition/".$_FILES['Filedata']['name'];    
	
		$sql = "INSERT INTO file_petition values(".$id.",".$_GET['id_pet'].",'".$path."')"; 
		mysql_query($sql) or die("ผิดพลาด : ".mysql_error());	  
	  	CloseDB(); 
	} 
}