Can't get Amazon Affiliate widget to work

Hi, I'm building my first website, using simple catch as my theme to learn on. I'm still trying to figure out if it's the right theme for me, but right now I'm having an issue. My site will be a blog that also promotes a book of mine. I tried for the first time tonight to add an Amazon Carousel link to the sidebar - the heading shows up but the carousel does not. I'm wondering if this is an issue with the free version of Simple Catch or if it's an issue with something I'm doing? Any suggestions would be appreciated. Thanks.