Contatore Visite - Non Funziona

[Cloud Web]

<?php

    /* Contatore visite */

    $visits_file = "visitetot.txt";
    $uniques_file = "visiteuni.txt";

    $counter = fopen($visits_file, "r");
    $total = fread($counter, filesize($visits_file));
    fclose($counter);
    $total++;
    $counter = fopen($visits_file, "w");
    fwrite($counter, $total);
    fclose($counter);

    $unique_hits = fopen($uniques_file, "r");
    $total_uniques = fread($unique_hits, filesize($uniques_file));
    if($_COOKIE["unique_hit"] != "set") {
    setcookie("unique_hit", "set", time()+2419200);
    $total_uniques++;
    }
    $uniques_hits = fopen($uniques_file, "w");
    fwrite($uniques_hits, $total_uniques);
    fclose($uniques_hits);
?>

Non appare niente nei due file.txt, come mai?