update profile steps in activity log

public function postUpdate($event)
{
    $profile = Zend_Registry::getInstance()->get("role");
    $currentRecord = $this->getTable()->find($event->getInvoker()->id);

    $profile->steps =  $profile->steps - $currentRecord->steps + 
                       $event->getInvoker()->steps;
    $profile->save();
}
	
public function postInsert($event)
{
    $profile = Zend_Registry::getInstance()->get("role");
	    
    $profile->steps += $event->getInvoker()->steps;
    $profile->save();
}