[AccessD] Problems with Refreshing Access Report on Intranet

All, 

We use Access 2007 to create a large number of reports from data that is
stored in a purchased package system.  This works very nicely.

Recently, we have built a new report that shows "production schedule
information".  Our users really like this new report, the catch is that
it takes about 2-3 minutes to generate it.

Because of this long generation time, I have set up a scheduled task to
run every 15 minutes to generate this new report.  The output is
exported as a PDF file.  One of the pages on our Intranet has a link to
this PDF file.  This approach has worked nicely.  

Our users really like being able to obtain this report instantly via the
Intranet rather than waiting 2-3 minutes when they generate it via the
Access application.

There is one problem, however.  If any user is viewing the PDF file when
the "refresh job" is running, the refresh is not able to place the new
PDF file in the Intranet's folder.

I am curious if anyone else has run into this problem and has ideas on
how to work around it.

Thanks,
Brad