Why won't the responses file open when I receive a submitted form

Hi all,  We have recently started to use Acrobat Pro X for editable pdfs.  When training was done (all work contained was created on our server) the responses file opened as it should when a submitted form was received.  Now trying to use these forms "live" the response file doesn't open.  The wording to double click the file and select the response file is in the body of the email of the submitted form but instead of the response file opening the form opens.  Anyone have any ideas??