Your second link tells it all. You have not installed Zenphoto on your site. The setup script is an integral part of the installation and it has not successfully run.
Quote:PHP version 4.4.9
Error!
Version 5.0.0 or greater is required. Version 5.3 or greater is strongly recommended. Use earlier versions at your own risk.
This tells us that the server configuration does not meet the Zenphoto requirements. At least your PHP is not at a high enough level. In addition you have not provided the MySQL credentials, so we do not know if the database version is also inadequate.
But first you MUST switch to PHP version 5 or greater as Zenphoto will not run on PHP 4 at all.