ATC

I installed jGallery, and it's displaying fine except for a PHP error message on the bottom that says "Notice: Object of class queryFactoryResult could not be converted to int in /xxxx/xxxxx/www/mytemplatename/includes/application_bottom.php on line 16"

Would you be able to help me with this? I have the Zen Cart installed on a Linux server. Do I need it installed on a Windows server?