ปัญหา copy : Warning: copy(C) [function.copy]: failed to open stream: No such file or directory in ... แก้ไขยังไง

<?php
				
if($file['tmp_name']!=''){
			$arr=preg_split("/[\.\(]/",$file['name']);
			$type=strtolower(end($arr));
			$filename=time().".".$type;
			@unlink("news/".$old_file );
			//copy($file['tmp_name'],"news/".$filename);
			@copy($file['tmp_name'],"news/".$filename);
	}else{
	$filename=$old_file;
	}
	
                $topic = $_POST['topic']; 
                $message = $_POST['message'];
                $name = $_POST['name'];
                $phone = $_POST['phone'];
                $email = $_POST['email'];
                $fileser = $_POST['fileser'];
				$files = $_FILES['file']['name'];
//print_r($_POST);
$sql_edit="update board set topic = '$_POST[topic]', flgtypnews = '$_POST[flgtypnews]', message ='$_POST[message]' ,name = '$_POST[name]', phone = '$_POST[phone]', email = '$_POST[email]', files = '".$_FILES['file']['name']."', fileser = '".$filename."' where id = '$_POST[idx]'";
              
mysql_query($sql_edit) or die(mysql_error());
                echo "<div class='alert alert-info'> Successfully Updated. </div>"; 

          $result = mysql_query("SELECT * FROM board WHERE id='$idx'");
 
            $data = mysql_fetch_object( $result ); 




?>