It happen to me too. I was in coffey and registered account. After login it gave me proxyban too. So I registered with new account at home and it is ok. It is outrages to pay like 451 satoshis.. the fees for transfer are far bigger...
Even if you pay more than that, you will get a rebate when registering as a copper member
https://bitcointalk.org/index.php?action=credit;promote