Preview view not working properly

I'm almost certain when I was working with my FrontPage 2003 program in the
past, that the Preview view showed me improvements (or lack thereof) that I
was making as I was making them off line. My Preview view still gives me a
web page when I'm connected to the Internet, but off the Internet the message
I get when I click Preview is something like - "Forget it!"

What can I do to get my Preview view to start working off line again?