If you are using Netscape Navigator 4.0 or later or Internet Explorer, make sure that the lock icon is closed, rather than open. Click on the lock or key. Your browser will automatically check the common name with the URL of the site that you are visiting. If they don't match, your browser won't allow you to set up an SSL session. Make sure that this is VeriSign or the RSA Secure Server Certification Authority.
Certificates are only valid for one year.
You browser won't let you do SSL with a site with an expired certificate. VeriSign - VeriSign can provide secure solutions which allow customers to create and manage certificate authority solutions for their own use. For example, as a network administrator you might want to issue certificates to all your users in order to allow them to digitally sign and encrypt their email. Or you might want to issue certificates to all your customers in order to allow them to securely access their accounts on your internal network. VeriSign's OnSite family of certificate services will allow you to control and manage the entire certificate issuance process, while relying on VeriSign to provide the operational and cryptographic expertise needed to issue certificates in a secure, trustworthy manner.