Custom Sort won’t work…

Hi there,

i try to custom-sort archives by title.

This snippet I found works so far:

add_action('pre_get_posts','sort_categories_by_title');

function sort_categories_by_title($x) {
	if(is_category()) {
		$x->query_vars['orderby'] = 'title';
		$x->query_vars['order'] = 'ASC';
	}
}

when I try to restrict this to a special category, it won’t work:

add_action('pre_get_posts','sort_categories_by_title');

function sort_categories_by_title($x) {
	if(is_category(7)) {
		$x->query_vars['orderby'] = 'title';
		$x->query_vars['order'] = 'ASC';
	}
}

The query(is_category(7)) seems to work, I placed an alert into this to check it.

But somehow, the custom-sorting won’t work anymore….

Thanks for your help.