"page not found" after article is published

Using 9/12/21013 download of Annotum Base. Can create article and preview it in draft form. Once submitted for review, approved & subsequently published, I am getting “page not found” messages when I try to access the article.

The article is visible as a title in a list on front page (Recent Articles) but when I click on the link to take me to read the article I get the “page not found” message.

At this time I am only user (admin). The Publish date is OK – I tried setting it for present day/time as well as earlier day/time.

Probably something simple …