[Help Wordpress] 403 permissions error

403 permissions error

Gday,

Getting 403 permissions error when trying to preview slider. When clicking save all the normal dialog pops up like it has saved but it really hasn't.

http://i.imgur.com/PnIzmfw.jpg
http://i.imgur.com/zbDpBCx.jpg

Weird thing is when i previously installed royal slider about a month ago i could create slides and preview them.

I have seen previous thread about same problem http://help.dimsemenov.com/discussions/royalslider-wordpress/1859-royal-slider-giving-me-403-permission-errors.

I have reinstalled plugin
made folders/files 777 (uploads/royalslider plugin folder/wp-admin ajax file)
Deleted all security plugins
Deleted all plugin i installed after i initially had royal slider working properly.

Thanks for your help im really stumped.

.

help.dimsemenov.com