looks like xyz.com pointed to remote nameserver (newbie)

Hello I have a Domain in name.com and hosting in namecheap.com. But while creating addon domain from cpanel. one of my domain is not getting forwarded to namecheap hosting. I have added namecheap nameservers(more than a week ago) for this domain still its showing this error message - looks like xyz.com pointed to remote nameservers. any help how can i solve this issue?