qc.to: bad domain

[vipermax]

Hi, i have a domain named stats.qc.to and i have tranfer it on ns2.unlimitedmb.com .when i have try to add my domain, thats say: "Some errors were found in the form you submitted
Invalid Domain Name."

Help?

[UnlimitedMB]

That is a subdomain of the domain qc.to
A valid domain is something like domain.com etc...