You are loading external content like e.g. the facebookFacebook like button from an external non HTTPS-HTTPS location. Therefore you get, therefore you're getting this error message. It is not the server or your page itself which is the problem. The, the problem is with the external content you are linking to.
If you want to fix those errors as well, then you would have to connect to all the external services (like twitterTwitter and facebookFacebook, etc...) over HTTPS as well.