FreeDns question

Hi,I’m trying to use to use a test domain. I want it to point to a subdomain on my DH domain, but apparently I’m not able to do it :).
I tried to add it as NS type, but I’m not sure what I am doing.

Anyone is using it?

Cupons:[color=#0000CC]MAO_HALFPRICE[/color] : pay only half of the price (L1 plans only) MAO97 get 97$ back