Domain Name change

Hi, I'm the admin for a little forum named BrickArk (http://brickark.forumotion.com/forum). I've recently been given control of the forum, because the founder has lost interest in the subject. Anyways, recently, the forum has gone through a few changes as of late and one of them was a domain change (the founder did that). The forum used to be called www.brickark.com . Now it is http://brickark.forumotion.com/ . However, when people try to register, the registration/verification link is still brickark.com, so the user must change the domain in order to get verified, thus users unable to join. is there any way to fix the verification link? Sorry if this can be solved in the Administration Panel; I'm new to this whole "Admin" thing.

TheMissingPiece