On our Windows Server 2003, we are unable to directly download PDF files. Instead we have to use a download.php file. I think it has to do with setting the automatic headers for PDF support but I have no idea how. If I try to directly access a PDF file it just says no data sent.
Direct pdf: http://orca.byu.edu/ibc/docs/BiologicalToxin.pdf
Workout: http://orca.byu.edu/download.php?file=ibc/docs/BiologicalToxin.pdf
Any ideas?