I don't udnerstand, because I've had his same problem. It appears as though my account is activated, but I wasn't ever sent an activation. Also, because of this, I too cannot send private messages or e-mails to other users.
never mind i figured it out. I sorta cheated the waiting process a little bit cause i could still reply to pms now, but now i can send them and be able to display a link leading me to my inbox.