Ssl Cetificate

Hi, we bought an SSL cetificate, however, the message about this is still displayed at checkout, what should I do to hide it?

extra info:

1. CS-Cart version: Multivendor 4.3.4
2. The message: Secure checkout. Appear when I click checkout
3. The SSL certificate was instaled on the server
4. In setting -> security settings, the option "Enable secure connection for the storefront" is set: "secure full site"