In tutorial we have told to upload the styles of flat responsive, so please check the tutorial once.
Upload the Slideshow Theme
With the flat responsive theme, you get a custom theme for the slideshow to match what you have seen on the live demo website. You can find this style in the the “flat-responsive-package” folder, then in that you will find a folder named “widgetkit”. In that is another folder “slideshow”, and then inside that is a folder named “flat-responsive”.
Using your FTP program, upload the “flat-responsive” folder into the “styles” folder here: