Interval setting has no effect

I’m trying to speed up my NextGen slide show so each of the two images is displayed for a shorter amount of time. But, when I change the the Interval setting to a lower number, there is no effect on the slide show. Here is the link to my NextGen slide show page: http://clivesoden.com/bg_clivesoden.com/test/

https://ww.wp.xz.cn/plugins/nextgen-gallery/