fopen and http://

Hi, I'm having a problem with fopen and http files. I keep getting the error: Warning: fopen(http://zed/htdocs/rgfindingaids/series594.html ) [function.fopen]: failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /home/awilliam/public_html/rgfaidstest.php on line 15 http://zed/htdocs/rgfindingaids/series594.html does not exist Warning: fopen(http://zed/htdocs/rgfindingaids/ser391.html ) [function.fopen]: failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /home/awilliam/public_html/rgfaidstest.php on line 15 http://zed/htdocs/rgfindingaids/ser391.html does not exist Warning: fopen(http://zed/htdocs/rgfindingaids/ser392.html ) [function.fopen]: failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /home/awilliam/public_html/rgfaidstest.php on line 15 http://zed/htdocs/rgfindingaids/ser392.html does not exist I have a text file /home/awilliam/public_html/rgfaids containing URLs such as: http://zed/htdocs/rgfindingaids/series594.html http://zed/htdocs/rgfindingaids/ser391.html http://zed/htdocs/rgfindingaids/ser392.html and I can bring up these URLs fine in a browser on the PC i'm running the script on. The following is my code: <? $filelist = fopen("/home/awilliam/public_html/rgfaids", "r"); if (!$filelist) { echo "error opening rgfaids"; exit; } while ( !feof($filelist)) { $line = fgets($filelist, 99999); $filetotest = fopen("$line", "r"); if (!$filetotest) { echo "$line does not exist<br>"; } elseif ($filetotest) { echo "$line does exist"; } } ?> But I don't understand why I am getting that error about failed to open strem: HTTP request failed, when I can bring up the links fine in a browser on the server running the php script. So can anyone help me out? Thanks