[manage_flamingo_inbound_posts_custom_column] not work

Hi guys,

I’m trying to edit the ‘subject’ column field’s values but the action ‘manage_flamingo_inbound_posts_custom_column’ seems not working properly.

Here is the code I wrote to test it:

add_action( 'manage_flamingo_inbound_posts_custom_column' , 'rm_flamingo_inbound_column', 10, 2 );
function rm_flamingo_inbound_column( $column, $post_id ) {
    switch ( $column ) {
        case 'subject' :
            $subject = get_post_meta( $post_id, 'post_select-956', true );
                echo $subject;
            break;
    }
}

This code do none, nothing change.
What’s the problem?

If I need to hide the same column, this code is working fine:

add_filter('manage_flamingo_inbound_posts_columns', 'rm_flamingo_filter');
function rm_flamingo_filter($columns) {
	unset( $columns['subject'] );
    return $columns;
}