Support

Mandatory information about my setup:

Have I read the related troubleshooter articles above before posting (which pages?)? No
Have I searched the tickets before posting? Yes
Have I read the documentation before posting (which pages?)? Yes
https://www.akeebabackup.com/documentation/akeeba-backup-documentation/native-cron-script.html
Joomla! version: (2.5.11)
PHP version: (5.3.26)
MySQL version: (5.5.32)
Host: (Versio)
Akeeba Backup version: (3.7.7 Pro)

EXTREMELY IMPORTANT: Please attach a ZIP file containing your Akeeba Backup log file in order for us to help you with any backup or restoration issue. If the file is over 2Mb, please upload it on your server and post a link to it.

Description of my issue:

I used my clients' host Cron application for creating a first cron.
The host command line example:
/usr/local/bin/php /home/pieteci58/domains/domain.com/public_html/script.php

I entered:
/usr/local/bin/php /home/pieteci58/domains/dw2.nl/public_html/httpdocs/cli/akeeba-backup.php --description="My automated backup"

The cron was initiated. It created the following message:
PHP Warning: PHP Startup: eAccelerator: Unable to initialize module
Module compiled with module API=20060613
PHP compiled with module API=20090626
These options need to match
in Unknown on line 0
Could not open input file: /home/pieteci58/domains/dw2.nl/public_html/httpdocs/cli/akeeba-backup.php

Unfortunately I don't know what/how to fix...

Thanks Nicholas.
It seems I completely missed this line under Scheduling information you refer to.
Works like a charm now!