SEO and W3 Total Cache

Hi,

I’m using W3 Total Cache on my website but when I audit the site to get a SEO mark it says that I’m not using caching and that I should minify the CSS and JS. Has anyone had this issue before? Or do you guess any reason for that behaviour?

I have set up the options in the settings, so forgetting them is not the issue.

Thanks for your time,
Xavi.