That domain is currently in use on another user's account.
Assuming of course you're that same user, which based by IP (you appear to have a dynamic one but it's still the same set of IP's it seems) you are, then you should be aware you're in violation of the TOS for having 2 accounts. Were it not for Christmas you'd find this one under a permanent suspension for multiple accounts and bypassing of a suspension.
In any case, given that it's in use on another account, we cannot move it from that one to this one, especially as the other one is currently under suspension.