Thread:Extension talk:Spreadsheet/not loading excel pages/reply (2)

I have the same issue, "Please wait, spreadsheet is loading." and I am running MW 1.21.2, PHP 5.4.14, MySQL 5.5.25, Pear 1.9.4. I think I have all the dependencies installed correctly. Added PHPExcel (running first) and the require_once "$IP/extensions/Spreadsheet/Spreadsheet.php"; and $wgUseAjax = true; to Localsettings.php. Even upped the PHP memory_limit to 512M just to be safe. Spreadsheet (Version 0.1) is shown. Looks like a great extension, any ideas anyone?