I have created a link in a smg composer file.  The link is to a pdf file.  I have changed the pdf and filed with the same name in the same location.  I have published the smg out as a svg file that has the link to the pdf file.  The problem is even though I have changed the pdf, when I open the link to the pdf it stil shows the pdf like it has not been changed.  I know it has changed because when I open the pdf on it's own it shows the changes but if I open though the link it does not show the changes.  Does anyone know what could be causing this?