HELP: can not Personalized Domain Name

why can not Personalized Domain Name,
while I was setting like this on. co.cc
Domain Name -------- Type/Pri ----------- Value
www.komlen.co.cc -----CNAME ------ komlen.forumm.biz

then when I try to access www.komlen.co.cc results like these
https://www.forumotion.com/en/search/www.komlen.co.cc

in admin panel -> General -> Forum Address -> Personalized Domain Name
if I fill out the form to write komlen.co.cc or www.komlen.co.cc domain, display a message like this:

The supplied domain name is not well configured
You have no CNAME redirecting to : komlen.forumm.biz

what should I do?
please help me.