.dir (created on Win) with FileXtra4, doesn't work on Mac

Question

Hello.
I created (on a Windows PC) a Director Project file for my MSc dissertation, using xtra "Filextra4".
I included some PDF files and when the user clicks on this file, it should open. This function works fine on Windows, but it does not on Macintosh.
I have this code:
property pdf_name
on beginSprite me
  Initialize me
end beginSprite
on Initialize me
end Initialize
on mouseUp me
  fxObj = xtra("FileXtra4").new()
  if the platForm contains "win" then
    pdf_path=the moviepath &"material\"& pdf_name
  else
    pdf_path=the moviepath &"material:"& pdf_name
  end if
  fxopen=fxObj.fx_FileOpenDocument(pdf_path)
  fxObj=0
end
on getPropertyDescriptionList me
  return \
#pdf_name: \
  #comment: "Name of the file to open:", \
  #format:  #string, \
  #default: "___.pdf" \
end getPropertyDescriptionList
and when I try to open a PDF file on a Mac, this message appears:
Director Player Error.
Script Error. Continue?
When I try to open a PDF file into Director on Mac, this message appears:
Script error: Object expected
fxObj = xtra("FileXtra4").new()
I have also tried all these steps:
1) I extracted the files "FileXtra4.x32", "FileXtra" and "FileXtra (carbon)" on a folder named "Xtras" which was in the same folder with the .app file.
2) I put all these files into folder C:\Program Files\Adobe\Adobe Director 11\Configuration\Xtras\FileXtra4, but also into C:\Program Files\Adobe\Adobe Director 11\Configuration\Cross Platform Resources\Macintosh\Xtras
3) I renamed the "Filextra4" file for Mac into FileXtra4.data, FileXtra4.rsrc and FileXtra4.cpio and put them into C:\Program Files\Adobe\Adobe Director 11\Configuration\Cross Platform Resources\Macintosh\Xtras
4) I added the line [#namePPC:"FileXtra4",         #nameW32:"FileXtra4.X32"] into XtraInfo.txt
but none of these steps worked.
Could you please help me to solve this problem?
Thank you in advance.

Answer 1

Which version of Director are you using?  If you are using Director 11 or 11.5, then FileXtra4 will not work on Macs.  And it will not always work on PC.  This xtra was never updated when DIrector's format changed in Dir 11.
If you are using Directo MX 2004 or earlier, then you should be able to simply download the Mac version of the xtra from the site and unpack it ON A MAC.  Put it in an external xtras folder (where the xtras folder is in the same folder as the projector).  Then burn the files (again, on a Mac).  If you ever put the unpacked Mac xtras onto a PC filesystem, then they will no longer work.