Not displaying K2 image on K2 article page header

Hello,
I'm trying to remove K2 article image from K2 article page header, but I can't do it by simply setting not to display article image on category preferences.

Is it possible to change it on template administration or should I change on k2 template?

Many thanks.

Hello,

Did you tried to remove the K2 category image from the category settings?

Hi,
yes, with categories all is working properly, not with articles. Now I changed directly item.php, removing image from the page header and solved.