LoggedIn LoggedOut query_posts()

I have an odd situation. The following:
https://jupiterthree.com/?page_id=1227&param=Secrets

returns expected results if I am logged into the site, but if I am not, I get a sorry no posts match msg. Here is the page template I am using…

…
$chapter = $_GET[‘param’];
get_header();
query_posts(‘meta_key=Chapter&meta_value=’ . $chapter . ‘&showposts=-1&orderby=date&order=ASC’);

while (have_posts()) : the_post(); ?>
…

Can anyone explain the behavior?

Thanx
Ed