CPanel Configuration / Addon Domain / CloudFlare

Hi - i installed today a new VPS Server with the latest CPanel. I created a new account and i like to add domains to this new created account. The Domains will be handled through Cloudflare. As soon as i like to add the domain through the CPanel, i get this error: "Sorry, the domain is already pointed to an IP address that does not appear to use DNS servers associated with this server. Please transfer the domain to this servers nameservers or have your administrator add one of its nameservers to /etc/[login to view URL] and make the proper A entries on that remote nameserver." I don't have any idea what i have to do. I set the cloudflare nameserver by the registrar of the domain, cloudflare already assigned the domain... the only thing i want is to know how to add domains to an account through the cpanel/cloudflare, that it will work in the future.