Menu not full width

add this to custom css
#custom-img-header img {width:100%;height:auto;}

and add this to functions.php or child theme functions.php

remove_action('bp_inside_container_wrap', 'meso_add_primary_nav');
add_action('bp_before_container_wrap', 'meso_add_primary_nav',20);

When I added that info to functions.php the site went white screen of death on me. I had to ftp and manually remove those lines to get it back up.
I put the lines just before the closing ?>
Any ideas?

Tried it again, and now I get TWO menus one just above the other and it moves the whole container down.

try add num order to
remove_action(‘bp_inside_container_wrap’, ‘meso_add_primary_nav’);
like this

remove_action(‘bp_inside_container_wrap’, ‘meso_add_primary_nav’,10);
add_action(‘bp_before_container_wrap’, ‘meso_add_primary_nav’,20);

Didn’t work. It still stayed the same size as the container

try change a bit, the num

remove_action(‘bp_inside_container_wrap’, ‘meso_add_primary_nav’,20);
add_action(‘bp_before_container_wrap’, ‘meso_add_primary_nav’,25);

higher if still not working or remove the num in remove_action