You might need to activate the ionCube PHP Loader / Zend Optimizer for your scripts to work properly. Please note that this can be done via the php.ini file for your account. You can easily manage the php.ini file from the PHP Configuration menu in the hosting Control Panel (Advanced > PHP Configuration). There are two editing modes / views available for the php.ini file: Basic mode and Advanced mode. Please feel free to use the Basic mode and enable the zend_optimizer feature by using the corresponding button.
Have in mind that ionCube/Zend and the APC extension (Alternative PHP Cache) are not compatible and cannot work simultaneously. If APC is enabled, ionCube/Zend would not work.