php - Trouble migrating Joomla from Linux to Windows server

I'm having some trouble migrating a Joomla website from a Linux server to a Windows server. The database came over fine, Besides that, all I've done is download all the files from the current site, and change configuration.php so the log and tmp directories show "./tmp/" and "./logs/"

I keep having an error in the PHP log stating

PHP Fatal error: Class 'JTable' not
found

I've downloaded the site multiple times now, and I'm convinced this is a configuration problem, and not a missing file problem. I've even tried installing a mod for backup on the linux box to try and migrate the site, but sadly the mod had problems installing.

The new server is running IIS 7.5 on Windows Web Server. PHP 5.2.14 and MySQL