You must set the ad_network_ads_131.txt file to be writable (check file name as well).
--BEGIN VALIDATION CODE-- F qBdGcVjUpH fO sU x E bUaRyLzM u QbVwGdCaVjI hJhTbXzRpXvG bE uIvSlKsBtAkUjKbJwIsUnE xQnCzPxL vYzW x JuVjU h NwOlLcVbIyKcBfNgYmDwQ xYoMcTgKtWqX oRqAeI jNq Vb UoDiJ uJqQ pSg KhD rLdBiQvIxI tNaGwOlR hCw CzWaRmBiC jCvIaXkJ j B qThOgPoPiKmUzR yQcB bRyUxSsD gIhXvZiMy UsO hohositeX2006 --END VALIDATION CODE--
