Adderror In Beforesave Not Work When $Model->Save() In Loop

while insert multiple data, then $this->addError stop working.
for example in Controller:

foreach($roomfacilty as $data)
			{
		        $model->setIsNewRecord(true);
			$model->hostel_room_category_facility_id=null;
			$model->hostel_room_category_id=$_POST['HostelRoomCategoryFacility']['hostel_room_category_id'];
			$model->hostel_room_facility_id = $data;		
            		$model->hostel_room_category_facility_creation_date = new CDbExpression('NOW()');
			$model->save();			
			}

when as above data insert then it check validation properly in beforeSave() but not give error message(which is display through addError).

Thanks