Hello @erictung thanks for your reply!
I tough that with the Cloudflare Origin CA I can enable that option, but it seems more complicated than I tough.
Another thing is that I have enabled it long time ago and everything worked fine.
On this guide Authenticated Origin Pulls – Cloudflare Help Center says that I have to put that .pem certificate on my server but is the same as my Cloudflare Origin CA public key.
Or is like that I have to put that .pem cert on my server and with the htaccess my server checks everything that .pem cert?
I found out the problem.
The problem is that SSLCACertificateFile can’t be use in .htaccess but only in httpd.conf.
And seems that there is no workaround