i corrected the problem by adding the following code to line 1 of the login page:
<?php
@session_start();
$varQS = "";
if(isset($_SERVER["QUERY_STRING"]) && $_SERVER["QUERY_STRING"] != "") {
$arrQS = explode("&", $_SERVER["QUERY_STRING"]);
foreach($arrQS as $k => $v) {
$arrVar = explode("=", $v);
if($arrVar[0] = "accesscheck" && $arrVar[1] = "%2Fportal%2Flogout.php%3F") unset($arrQS[$k]);
if(isset($_SESSION['WASA_accesscheck']) && $_SESSION['WASA_accesscheck'] = "%2Fportal%2Flogout.php%3F") unset($_SESSION['WASA_accesscheck']);
}
if(sizeof($arrQS) > 0) {
$varQS = "?".implode("&", $arrQS);
}
$_SERVER["QUERY_STRING"] = $varQS;
}
?>