There should be a "contact us" link somewhere on that forum(on this forum it is at the bottom of every page) By clicking it you will circumvent all forum protocols and be contacting the owner or his agent directly via email. If the forum is still otherwise active there's at least a dozen reasons I can think of that your membership did not get activated, but one email should clear it right up.
Hope the forum is still active as model tugs sounds like a fun subject.
Craig - AKA Some Clueless Idiot
The person who is saying something is impossible should not interrupt the person who is doing it.