You haven’t mentioned what site you’re having issues with, so here’s a general checklist for diagnosing why your site isn’t showing up as secure:
 Obvious things first: Is it plugged in? That is to say: Are you visiting the secure (https://) version of the site? If you want to make all access to your site secure, you may want to set up the HTTP version of the site to redirect to HTTPS.
 If you bought the SSL certificate from us, you were prompted for a confirmation email address. Have you received an email from our SSL provider at that address and clicked on the link in it? If you haven’t, you may need to request the confirmation again. (Make sure you have email set up on the domain!)
[*] If that’s not it, there may be some insecure content on your site that’s making web browsers not display the padlock. If you’re using Google Chrome, insecure content will generate warnings in the developer console. There’s also a handy tool for diagnosing these sorts of issues at http://www.whynopadlock.com/.