Well in my case I had that problem due to the .htaccess on the website. I'm at the stage of making my website and I don't want anyone else to see it online till it's finished and that's why I've put the .htaccess file (you know, no one can access the website or any file on the server without entering the login and password which are configured in the .htaccess file). To check the proper functionality I removed during the test that file and everything started to work properly.
If that's not your case then I suggest looking into the cms permissions of "Can Download Attachments" for unregistered users.
Try clearing the system cache in the maintenance tab after adding an article.
Check the folder where you store the slider files and see if it's attributes are 0777.
|