[version 1.4.4] Fatal error after installation & configu

Hi,
I'm trying to upgrade my gallery from 1.3.3 to 1.4.4. After configuration is done, I got the below message:

Fatal error: Call to a member function on a non-object in gallery/classes/Album.php on line 1327

Please help me if you have any idea.

Thanks
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Give us your Gallery/webserver information to get a faster answer.
Get this information from the PHP diagnostic (in the configuration wizard).
Gallery URL (optional but very useful): http://life.twbbs.org/gallery144/
(original version 1.3.3 http://life.twbbs.org/gallery)
Gallery version: 1.4.4
Apache version: Apache/1.3.29
PHP version (don't just say PHP 4, please): 4.3.8
Graphics Toolkit:
Operating system: FreeBSD 4.10-STABLE
Web browser/version (if applicable): IE 6