Cloudflare plugind doesn't recognize I use WP?

Hi,
I Installed the Cloudflare plugin, and connected it with my account. Seems like Cloudflare doesn’t recognize I use WP, and also the plugin doesn’t recognize the account. I did it easily on a different site of mine.
I get an error message on the CF dashboard: " Note: This optimization is only available for websites using WordPress. We did not detect WordPress running for…{site}."
And another error on the CF plugin on WP dashboard: It looks like your domain {site} is not provisioned with Cloudflare. Please continue to Cloudflare to secure and speed up your website.
Thanks