Site will not use HTTPS, and will only show HTTP

I have set the site urls to use HTTPS, I have added this plugin… I have 3 different websites and three different SSL certificates, and I cant get any of them to use HTTPS. Even when I type it in i.e https://www.mydomain.com it still uses http://..

I have no redirects on in cPanel either. all Certificates added ok to cPanel.

http://wordpress.org/extend/plugins/wordpress-https/