You need to setup the ionCube PHP Loader as the error message is telling you.
Download the appropriate loader from here: http://www.ioncube.com/loaders.php
Follow the docs to get it setup: http://www.ioncube.com/loader_installation.php
There is a loader wizard that helps with the setup: http://www.ioncube.com/loader-wizard/loader-wizard.zip
Once you have the ionCube PHP Loader working, the encoded script should just work.