APEXUTIL.Get_file... need to force a prompt to save, open or cancel

Question

I'm a newbie to APEX and am using APEX_UTIL.Get_File to open static files (PDF documents).  The requirement specifies that the user must be prompted whether to save or open the file.  We have created a "popup" page with dynamic PS/SQL:
DECLARE
    l_file_id NUMBER;
BEGIN
        SELECT id INTO l_file_id FROM APEX_APPLICATION_FILES
WHERE filename = 'LDSNav.pdf';
        APEX_UTIL.GET_FILE(
              p_file_id   => l_file_id,
              p_inline    => 'NO'); 
END;
For some reason, the file is loaded into the new page (as if we had coded p_inline => 'YES')  rather than prompting the user to save or download when testing using IE and Chrome.   When testing in FireFox, it does not recognize the mime type and loads the file as it it were a text document.
Any ideas on how we can fix this?
Thanks.

Answer 1

In SQL Workshop, run this:
SELECT id, filename, mime_type
FROM APEX_APPLICATION_FILES
WHERE filename = 'LDSNav.pdf';
If mime_type is not 'application/pdf' (or something similar), that could cause problems.
Make sure you don't have any Branches per Documentation:
APEX_UTIL.GET_FILE()
MK