HTTP Upload of large files problem

I'm trying to make a page for file uploads. For small files, everything goes ok, but doesn't work when I try to upload large files. The limit size for uploading is suposed to be 100Mb. I've set up my php.ini with this config: post_max_size = 100M memory_limit = 128M upload_max_filesize = 100M When I access through http://localhost/upload.htm, and post a large file, Ok. But if I access the page remotely, or even locally, but using my LAN IP Address (http://192.168.0.15/upload.htm) and post a large file, either browser stays as is (hangs) or, most commonly, the browser shows a "server not found"/"page cannot be displayed" page, instantly. But, as I sad, this problem occurs only when posting large files. Additional config: Browsers: Internet Explorer 6 and Netscape 7 (netscape pops a "document contained no data" message) Server API: CGI PHP Version: 4.2.1 Server Software: Microsoft-IIS/5.0 Here goes the scripts: // ----- upload.htm ------ // <form action="upload.php" method="post" enctype="multipart/form-data" name="form1"> <p> <input type="hidden" name="MAX_FILE_SIZE" value="102400000"> <input name="file_name" type="file" id="file_name"> </p> <p> <input type="submit" name="Submit" value="Send"> </p> </form> // ----- upload.php ------ // <?php $temp_file_name = $HTTP_POST_FILES['file_name']['tmp_name']; $original_file_name = $HTTP_POST_FILES['file_name']['name']; move_uploaded_file($temp_file_name, $original_file_name); ?>