I get this error when updating the script or any plugins
Fatal error: Class 'ZipArchive' not found in /home/lvswing/public_html/ow_system_plugins/admin/controllers/plugins.php on line 529

the server tech said "The file is missing from his files. All the script requirement is already installed."
Is there any way to check this I have changed host many times and can't get the script to run right on any of them I would go with one of the host listed here, but they are to expensive, we don't charge to belong to the website. This is line 529 as the script is installed
            $zip = new ZipArchive();


Thanks
Bob