[Plugin: Shortcodes Ultimate] Slider

I am trying to put a slider on a page https://bcbdigital.com/about/ that references a seperate post to pull its images from? https://bcbdigital.com/sliderpost/

This is the code I am using:
[nivo_slider source=”post=%731%” link=”permalink” size=”700×300″ limit=”3″ effect=”boxRandom” speed=”600″ delay=”3000″]

I also tried using a specific category designation https://bcbdigital.com/category/for-image-carousel/ and only pulling images from the designated category and i got an error code: Nivo slider: no attached images, or only one attached image…

In theory this should work… ??
Where am I going wrong.

https://www.ads-software.com/extend/plugins/shortcodes-ultimate/