so it doesn't redirect then... or you might need to wait a bit longer (up to 24 hours) as sometimes redirections take time. You could also try clearing your browser's cache as sometimes this does prevent updated stuff from displaying. Or access the site through a different browser / device and see if it loads up the secure version.
with SSL certificates everything gets redirected automatically. But if you don't have the certificate installed (which usually comes free when you buy hosting) you need to redirect each URL. I think there are method of doing this automatically for all URLs but I'm not particularly good with redirections so I don't know the exact steps, but you can google them... or maybe someone else can answer this