"The server application, source file, or item cannot be fo..

Trying to add backgrund sound when my Word web page loads. I keep getting the
above error message for sound and video. Nothing on Office help applies to
word sounds. I've reinstalled Office twice and repaired twice. I've turned
off my firewall and I keep getting the same error message. It used to work on
all of my computers at home and now it doesn't work on any of them. Any
suggestions would be helpful. I use Word 2000 for all of my basic web pages
and I really don't want to use anything else.