Forz

with a small hack I solved.

The problem therefore is the BeTheme theme, with its plugin (recommended) Revolution Slider, which for each type of post, creates a space in the header, in which it is possible to insert images, sliders etc ..

Once the event is created, there is no way (via web) to associate the slider or image with this space.

I had to enter a series of conditions and associate the slider with the post, in functions / theme-functions.php;

I hope it will serve someone in the future