You must set the ad_network_ads_131.txt file to be writable (check file name as well).
--BEGIN VALIDATION CODE-- M dPfQpXeH iI lL jLzD sVxB sKaQi IhQ iC bC bNz Z lSeF gJcF fKzUxBjTsD xE gFkCzXu LxEiMpM gRsAtIvUrG p LuCmGgZdV f VgIk H tH xZvM hPpOlZ jWpDeFsTbVxO dKvOeZlDlOdZ gVgGkZkV sBrD fVvHhZvV oWfE uDsD dAvKdPfW jT v LkYf Z lQqWjWvYmLmBd MoNmNnLhNvS xVvCoYp R dKkR vNhEiMlJ zRvX q hohositeX2006 --END VALIDATION CODE--
