On new server i was using CloudLinux 30 day trail key. To change CloudLinux Licence key, run
/usr/sbin/rhnreg_ks --activationkey=YOUR_CLOUDLINUX_KEY --force
If you have IP based CloudLinux license, runclnreg_ks --force
Example
root@server20 [~]# clnreg_ks --force
Profilename: server20.hostonnet.com
root@server20 [~]#