Restrict Access to Page () Behavior

[VeronicaCBurgess]

I am having a problem with Dreamweavers "Restrict Access to Page()". When this is added to the page, it automatically redirects me to the failure page. This has just began happening after working fine before. Here is some code (I am using PHP 4 and MySql)
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<?php require_once('../../Connections/vonbarlow.php'); ?>
<?php
// *** Logout the current user.
$FF_Logout = $HTTP_SERVER_VARS['PHP_SELF'] . "?FF_Logoutnow=1";
if (isset($HTTP_GET_VARS['FF_Logoutnow']) && $HTTP_GET_VARS['FF_Logoutnow']=="1") {
  session_start();
  session_unregister("MM_Username");
  session_unregister("MM_UserAuthorization");
  $FF_logoutRedirectPage = "adminlogin.php";
  // redirect with URL parameters (remove the "FF_Logoutnow" query param).
  if ($FF_logoutRedirectPage == "") $FF_logoutRedirectPage = $HTTP_SERVER_VARS['PHP_SELF'];
  if (!strpos($FF_logoutRedirectPage, "?") && $HTTP_SERVER_VARS['QUERY_STRING'] != "") {
    $FF_newQS = "?";
    reset ($HTTP_GET_VARS);
    while (list ($key, $val) = each ($HTTP_GET_VARS)) {
      if($key != "FF_Logoutnow"){
        if (strlen($FF_newQS) > 1) $FF_newQS .= "&";
        $FF_newQS .= $key . "=" . urlencode($val);
      }
    }
    if (strlen($FF_newQS) > 1) $FF_logoutRedirectPage .= $FF_newQS;
  }
  header("Location: $FF_logoutRedirectPage");
  exit;
}

// *** Restrict Access To Page: Grant or deny access to this page
$FF_authorizedUsers=" ";
$FF_authFailedURL="/jazz/backend/login_failure.php";
$FF_grantAccess=0;
session_start();
if (isset($HTTP_SESSION_VARS["MM_Username"])) {
  if (true || !(isset($HTTP_SESSION_VARS["MM_UserAuthorization"])) || $HTTP_SESSION_VARS["MM_UserAuthorization"]=="" || strpos($FF_authorizedUsers, $HTTP_SESSION_VARS["MM_UserAuthorization"])) {
    $FF_grantAccess = 1;
  }
}
if (!$FF_grantAccess) {
  $FF_qsChar = "?";
  if (strpos($FF_authFailedURL, "?")) $FF_qsChar = "&";
  $FF_referrer = "Restricted Area";
  $FF_authFailedURL = $FF_authFailedURL . $FF_qsChar . "accessdenied=" . urlencode($FF_referrer);
  header("Location: $FF_authFailedURL");
  exit;
}

$maxRows_Calendar = 3;
$pageNum_Calendar = 0;
if (isset($HTTP_GET_VARS['pageNum_Calendar'])) {
  $pageNum_Calendar = $HTTP_GET_VARS['pageNum_Calendar'];
}
$startRow_Calendar = $pageNum_Calendar * $maxRows_Calendar;

mysql_select_db($database_vonbarlow, $vonbarlow);
$query_Calendar = "SELECT EventDate, EventTime, EventTitle, EventDetails, EventLocation FROM tblCalendar ORDER BY EventDate DESC";
$query_limit_Calendar = sprintf("%s LIMIT %d, %d", $query_Calendar, $startRow_Calendar, $maxRows_Calendar);
$Calendar = mysql_query($query_limit_Calendar, $vonbarlow) or die(mysql_error());
$row_Calendar = mysql_fetch_assoc($Calendar);

if (isset($HTTP_GET_VARS['totalRows_Calendar'])) {
  $totalRows_Calendar = $HTTP_GET_VARS['totalRows_Calendar'];
} else {
  $all_Calendar = mysql_query($query_Calendar);
  $totalRows_Calendar = mysql_num_rows($all_Calendar);
}
$totalPages_Calendar = ceil($totalRows_Calendar/$maxRows_Calendar)-1;
?>

Any answers are appreciated.