Let IE9 download automatically a file

I want to download a file from internet, but I want to avoid the prompt asking me for opening or downloading it.

I would like to download it directly in a folder (I already know that any download is safe).

I tried following http://support.microsoft.com/kb/162059/nl and https://social.technet.microsoft.com/Forums/ie/en-US/57402307-1cbd-49db-aabd-65c2fea19ed9/ie9-do-you-want-to-open-or-save-this-file-prompt?forum=ieitprocurrentver procedures about setting AttachmentExecute up, but it is only for opening automatically the file, not saving it in a specific folder.

How may I solve it?

Any help?