protected function afterCreate() {
	
		// unset the other defaults
		$this->unsetSiblingsDefaults();

		// get the rule_id of default module
		$defaultRuleId = $this->getDefaultModule();

		if ($defaultRuleId) {

			// create first ACL with rule_id of default module
			$acl			= new Acl();
			$acl->ruleId	= $defaultRuleId;
			$acl->groupId   = $this->id;
			$acl->default	= TRUE;
	
			$acl->create();
			
		}

	}