MySQLi exception

I'm looking forward to giving Omeka a try, and think it will work great for our project. Unfortunately, I can't even get to the installation step. After editing the db.ini file (using localhost for the server) and uploading I receive this error "The Mysqli extension is required for this adapter but the extension is not loaded." When I review the phpMyAdmin section, I can see it says that the mysqli extension is available. Our host is NetLogistics, with MySQL 5.0, and PHP 5.0. I only have limited access through Plesk 8.0, and limited experience.

Any help would be appreciated.

Cheers,
David

You will need PHP version 5.2.4 or greater with both mysqli and exif extensions installed.

Here are the full requirements: http://omeka.org/codex/Preparing_to_Install