Trying to get Terracaching up and running, but summat aint right!

It turns out I registerred in 2006, and I have had 3 emails wanting to sponsor me. On the emails it says go to Terracentral and follow the link from there to accept, or decline........but I cannot see any links, other than the Top Referrers, and the "register starter account", and "click here" for activation email. I have tried the click here, and enter my details and it says that the username has already been taken. I remember the other night being on a page where you have to log-in, but cannot find it.

Anyone know where the accept or decline link is?

Oh, and I have been on a page where the messages are and it says I have no new messages.

Whats going on?