How do I use Cisco Registered Email Service with 10.7?

I received a email via someone using Cisco Registered Email/Envelope Service. The authentication process required the latest version of JAVA for 10.7, which I downloaded and installed. When I try to logon, the screen hangs with the message "Loading Envelope Tools." If I press "open" again it states "Inactive tools." The alternate method is to open the mail via a secure Web site, which I can open, but I am unable to download attachments. To download attachments, I am directed to a page that begins with "x-msg:" and I get a message that says: "Safari can't open the address .. . because MAC OX doesn't recognize Internet Addresses starting with "x-msg:"