readfile() Problems

[manutd]

Hi guys Im new here. Ive got a small problem. I have a simple uploading script, had problems with that too but its working fine now to a certain extent. When I set a download link for the files that have been uploaded and click to download, it downloads but I get the following errors when I open the file, its a .txt file. But it seems to happen on all files also, it allows me to download .png, .php, .jpg bout it wont actually open them once they are downloaded  (Ive change the domain to an example, its not my actual domain within the warnings below):

 

The following warnings occurred:
Warning [2] filesize() [function.filesize]: stat failed for http://mydomain/expiry_files/downloads/text.txt" - Line: 69 - File: expiry_download.php PHP 5.2.17 (Linux)

 

Warning [2] readfile(http://mydomain/expiry_files/downloads/text.txt") [function.readfile]: failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found - Line: 70 - File: expiry_download.php PHP 5.2.17 (Linux)

 

 

 

Here my download file, most of it  (Ive also attached an image of the text file after I downloaded it and opened it, below):

 

if (isset($_GET['id'])){
		$file_id = (int)$_GET['id'];			
		$file = $db->query("SELECT * FROM ".TABLE_PREFIX."expiredownloads WHERE `id` = {$file_id}");

			$row = $db->fetch_array($file);

			if ($row['expire_end'] < time()){

					//// Do nothing Yet

				}else{
			    
                                        $link = ''.$mybb->settings['bburl'].'/expiry_files/downloads/'.$row['expire_file'].'"';
				$filename = $row['expire_file'];		
				header('Content-type: application/octetstream');
				header('Content-type: application/octet-stream');
				header('Content-Description: File Transfer');
				header("Content-Disposition: attachment; filename=\"$filename\"");
				header('Content-Length:'.filesize($link));
				readfile($link);
				}
			}

 

Hope you guys can spot a problem, If you require anymore information, just shout. Thanks in advance.

[ManiacDan]

Does that file actually  exist?

 

Is allow_url_fopen set to true in your php.ini?