File dokumen yang sudah ane upload waktu ane test download sendiri ternyata berubah jadi file biasa dan file ane muncul tulisan error

"<br />
<b>Warning</b>: readfile(file779_drsharimurjanto_DAFTAR TENAGA PENDIDIK DAN KEPENDIDIKAN YANG MENGIKUTI PROGRAM BPJS.docx): failed to open stream: No such file or directory in <b>/home/smahang1/public_html/elearning/download.php</b> on line <b>9</b><br />
"
INI SCRIPT DOWNLOAD.PHP ANE

1 <?php
2 session_start();
3 if(isset($_SESSION['username'])){
4 header('Content-Description: File Transfer');
5 header('Content-Type: application/octet-stream');
6 header('Content-disposition: attachment; filename='.$_GET['name']);
7 header('Content-Transfer-Encoding: binary');
8 header('Content-type: '.$_GET['tipe']);
9 readfile($folder_upload.'file'.$_GET['name']);
10 }else{
11 die("Nggak boleh download!");
12 }
13 ?>

BAGAIMANA GAN CARA MENGATASINYA?HELP MEEEE.....