Magento – Customer activation field

I am working on one custom module where i need to show customers.After getting the customer fields i am little confused that for customer activation which field is to be set.Is Active or Customer Activated ? I am trying to update customer info and it updates customer activated but not is active.
My code is follow :

$id = $this->getRequest()->getParam('id');
            $model  = Mage::getModel("customer/customer")->load($id);
             $model   ->setWebsiteId($websiteId)
            ->setStore($store)
            ->setFirstname($data['firstname'])
            ->setLastname($data['lastname'])
            ->setEmail($data['email'])
            ->setCustomerActivated($data['is_active'])
            ->setIsActive($data['is_active'])
            ->setGroupId($data['group_id']);
             $model->save();

I want to set customer status either active or not on basis of either is active or Customer Activated.