[Doggie52]

You most likely need a PHP version that is above 5. You can use this on as many servers as you would like - all you need to do is extract one instance of the configuration file for each server (perhaps config2.php, config3.php, config4.php?) and configure it accordingly. The script, when run, looks only for config.php, so make sure to have the configuration file for the server you would like to update renamed to config.php.

Also, if you have a revision of the script below revision 10 - please update immediately to the latest revision. There was a bug in revision 9 which prevented MySQL users from manually entering a forum URL for a plugin.