Simple Cron job

[friendlygiraffe]

Hi, I've set up a simple cron job (runs a php script) in the 'Scheduled Tasks' area of the Plesk Control panel

I get this error:

Failed loading /usr/lib64/php/modules/ioncube_loader_lin_5.3.so: /usr/lib64/php/modules/ioncube_loader_lin_5.3.so: undefined symbol: php_body_write
PHP Fatal error: Directive 'safe_mode' is no longer available in PHP in Unknown on line 0

Any ideas how I can fix this ?