SSL certificates are issued by many organizations. Your browser will give you a warning when it could not find the issuer from browser's own list of issuers. This doesn't mean the SSL certificate is bad or invalid. It only means your browser could not recoganize this particular certificate issuer. If you are using Internet Explorer, you may run "Windows Update" and update your "root certificate". After the update, you will not see the warning when you get to our SSL secure pages.