Ресайз изображения инфоблока в свойстве

AddEventHandler("iblock", "OnBeforeIBlockElementAdd", "OnBeforeIBlockElementAddHandler");
AddEventHandler("iblock", "OnBeforeIBlockElementUpdate", "OnBeforeIBlockElementAddHandler");
function OnBeforeIBlockElementAddHandler(&$arFields)
{
   if ($arFields['IBLOCK_ID'] == 2)
   {
      $pv = "PROPERTY_VALUES";
      $pID = 49;      // ID свойства "MORE_PHOTO" = 106       
      $size = array("width" => 300, "height" => 300);
      
       if (count($arFields[$pv][$pID])>0)
       {
           foreach($arFields[$pv][$pID] as $k => $photo)
           {
               if (strlen($photo['name'])>0 && !$photo['error'])
               {
                  CAllFile::ResizeImage($arFields[$pv][$pID][$k], $size);
            }
         }
      }
   }
}