Vista - Can't Open Hyperlinks from Access 07

Hello:

I am using Vista and Office 2007. We have an Access database with
hyperlinks to documents on our network. One user cannot open these links but
others logged onto the same computer can.

The user gets the standard message "Some files can contain viruses or other
wise be harmful to your computer". Would you like to open this file? When the
user clicks "OK" they get the message "Cannot find this document".

However, if you copy the hyperlink from the Access database and paste it
into Explorer the document opens. So, there must be some setting either in
Vista, Office 2007 or Access 2007 that is different for this user but I
haven't been able to find it.

Any ideas?

--
Thanks,
Theresa