Variable `org-mobile-directory` must point to an existing directory. Multiplatform setup, howto

Question

I configured emacs org-mode on a Mac, working properly, having my org files and MobileOrg file within my DropBox folder ( ~/DropBox/ ), and detailed as follows:

;; Set to the location of your Org files on your local system
(setq org-directory "~/DropBox/org")
;; Set to the name of the file where new notes will be stored
(setq org-mobile-inbox-for-pull "~/DropBox/org/flagged.org")
;; Set to <your Dropbox root directory>/MobileOrg.
(setq org-mobile-directory "~/Dropbox/MobileOrg")

Now, I will like to get my emacs setup working properly on my Windows box. I have been able to get it working in terms of reading my .emacs file and emacs.d folder, shared through symlink configuration.

Everything seems to be working properly, except that when I want to execute org-mobile-pull or org-mobile-push on Windows, I get the following error: "Variable org-mobile-directory must point to an existing directory "

The problem seems to be that emacs isn't configured to read or point to the org-mobile directory , per the paths set in .emacs (eg. = "~/DropBox/ ...........").

I found some info on the web, which pointed to setting a parameter on .emacs so that it identified while running on Windows, that it should look into a directory structure.

Now, how should I accomplish this appropriately?

I found some examples of:

;;On Windows (if (eq system-type 'windows-nt) (progn (setq default-directory "C:\Usuarios/User/") ) )

But it doesn't seem to be doing the job.

Thanks for any help.