Why do I receive a pop-up box stating that some pages are secured when others are not, even though all of the pages reside underneath the domain using the SSL certificate. All of the pages are using relative links.

Be sure that all hyperlinks (ie <a href=””> and <img src=””>) are using relative links or absolute links with “https:” set as the protocol. You must be referencing some absolute links with “http:” as the protocol instead of “https:”. You can search your code for http: and find the content that is not linked using https.