Accessing Secure Mail from my wife's work

When I installed Outlook Office 2007 Beta 2, I am no longer able to get
secured email from the company my wife works for. I still get the email with
the link to their secure servers, but when I click on the link instead of
going to the e-mail message it takes me to a log-in screen. If I copy and
paste the original link into the browser it will then take me to the message
body.

I never had to do this with Outlook Office 2003.

Any Ideas why this may be occuring?

John Hoy