So, you have signed up and forgot the password already? Or why have you requested forgotten password via the link?
We have no confirmation policy here. After you register, you can straight log in with the username/password registered. It's a root miniBB concept - no spare actions.
As far as I understood, you went further for some reason, clicked on Forgotten Password link, then received link to reset your password. Of course you will be not logged in, clicking on confirmation link in such kind of email. Your new password is listed at the very top of this email. You will need to enter it amongst username you registered.
I'm wondering how deeply incorrect Internet became last years... people already think they must do this and this, and do not pay attention at what the screen messages say... bad.