I see a hosting account linked to the forum account, name is szklarsk. Though the account has not been fully created (e-mail is however confirmed so it should be all good to go for creation).
The first error implies that the creation fell out of the queue in some way (queueID invalid).
The second states that the system could not connect to the server to create the account.
The third is simply that an entry for interpido.co.cc already exists (remedy from your first two attempts no doubt).
After checking in the backend, it does look like there's an account by the name szklarsk, with the domain interpido.co.cc. The account itself seem to be working, but for some reason it doesn't connect to your forum account.
Gonna have to escalate and ask an admin to take a look.