Thread:Extension talk:PDF Include/Preview works, but the attempt to save shows empty page

I followed the instruction: I saved the code as extensions/pdf_include.php At LocalSettings.php, I added the lines require_once("$IP/extensions/pdf_include.php"); $wgPDF = array('width'=>'width', 'height'=>'height', 'black'=>array('Blocked Domain','Blocked Domain 2.....')); $wgPDF['black'] = array('Blocked Domain','Blocked Domain 2.....'); //The best way to block Domains/Do only write the $ $wgGroupPermissions['*']['pdf'] = true; //Allow it for ALL/SHOULD NOT USED!!!!!!!!! $wgGroupPermissions['user']['pdf'] = true; //Allow it for USERS/MAYBE SHOULD NOT USED!!! $wgGroupPermissions['bot']['pdf'] = true; //Allow it for BOT/SHOULD NOT USED!!!!!!!!! $wgGroupPermissions['sysop']['pdf'] = true; //Allow it for SYSOP/STANDART

Then, I type simple code at http://mizugadro.mydns.jp/h/index.php?title=Testpdf&action=edit http://mizugadro.mydns.jp/MIZU/14bw.pdf This code shows the preview, but the attempt to save hangs the brouser.

What do I wrong?