Hey, im trying to withdraw my BTS from BTer and the order gets processed - but it eventually gets canceled with the error - "BTS Account not registered"

Im using the local wallet with brain key and backup on the official wallet

BTer says "Must be registered account on the blockchain or unregistered account KEY. Memo can be entered after the address separated by a space, format: Account Memo"

How do I go about getting my unregistered account KEY? I tried the "active permissions account key" from the wallet - but still the same.

Am i missing something here? I dont wanna use cloud wallet because of all the problems people are having with there passwords not working.