That's because you still have a lot of resources that are served over HTTP, things that this plugin doesn't take care of.
Example:
Mixed Content: The page at 'https://www.bgobsession.com/content.php/1079-Blognostications-Week-7-Redskins-at-Eagles-Edition' was loaded over HTTPS, but requested an insecure image 'http://bgobsession.com/images/smilies/smile.png'. This content should also be served over HTTPS.
Mixed Content: The page at 'https://www.bgobsession.com/forum.php?home=1' was loaded over HTTPS, but requested an insecure image 'http://bgobsession.com/images/icons/icon1.png'.
In the AdminCP under Styles & Templates, create a replacement rule of:
http://www.bgobsession.com to
https://www.bgobsession.com