Problem with WP Stats Helper

Running WP Stats and WP Stats Helper on a WP 3.2.1 site with a child theme based on the stock 2011 theme. The “Most Visited Posts” widget will only show stats when I am logged in as an admin. When not logged in it shows “No data yet”. Anyone have any idea as to what may be the cause? Runs fine on other sites I am running with the same version of WP, but different theme.