droppnig virtual directories and style sheets

We have a classic ASP (3.0) application running on Server 2003. Every
so often our application seems to not be able to get to a virtual
directory. We include a header.inc file through a virtual directory
and about once a day we'll see that the header doesn't show. The only
thing I can think of is that it can't resolve the virtual directory.
I've searched the logfiles, but I can't find anything pertaining to
virtual directories. I've also searched the event viewer and nothing.

Also, not sure if this is related, but about once a day, we'll also
see a page that isn't styled through our CSS. It's being added with
.

Any ideas. Thanks.

Re: droppnig virtual directories and style sheets

Also, this happens approximately once a day for every user on the
site.
Scott