Download program WAGO 750-843

I have a Wago 750-843 and whenever I restart it, the program is lost and it retrieves the previous program. My question is, what kind of configuration do I need to make in order to force it to retain the recent program?
Thank you.

Make sure you have download the boot project.
In Codesys 2.3, Online / Create boot project (En ligne / Créer projet d’initialisation)
Make the sure the mode selector, located behing the cover flap, is set to the top (RUN) but I guess this is done if your previous program is running by itself.