[RESOLVED] login failed message

[JBWebWorks]

i have used this code in the past but can't get it to echo the message
do you see anything wrong with this code?

<?php echo (isset($_GET['failed']))?"The Login information you provided is not valid. Please try again":""; ?>

thanks for your help
JBWebWorks

[NogDog]

It works, but nothing will be output if there is not a "failed" value in the URL query string (either explicitly in a link URI or by a field in a form which uses the GET method)>

[JBWebWorks]

This is the login authorization code. Login validates and allows or restricts as it should, but a failed login does not produce the error message?

<?php
// *** Validate request to login to this site.
if (!isset($_SESSION)) {
  session_start();
}

$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
  $_SESSION['PrevUrl'] = $_GET['accesscheck'];
}

if (isset($_POST['username'])) {
  $loginUsername=$_POST['username'];
  $password=$_POST['password'];
  $MM_fldUserAuthorization = "";
  $MM_redirectLoginSuccess = "bloginsert.php";
  $MM_redirectLoginFailed = "bloglogin.php";
  $MM_redirecttoReferrer = false;
  mysql_select_db($database_connmpmga, $connmpmga);

  $LoginRS__query=sprintf("SELECT username, password FROM blog_register WHERE username=%s AND password=%s",
    GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text")); 

  $LoginRS = mysql_query($LoginRS__query, $connmpmga) or die(mysql_error());
  $loginFoundUser = mysql_num_rows($LoginRS);
  if ($loginFoundUser) {
     $loginStrGroup = "";

//declare two session variables and assign them
$_SESSION['MM_Username'] = $loginUsername;
$_SESSION['MM_UserGroup'] = $loginStrGroup;	      

if (isset($_SESSION['PrevUrl']) && false) {
  $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];	
}
header("Location: " . $MM_redirectLoginSuccess );
  }
  else {
    header("Location: ". $MM_redirectLoginFailed );
  }
}
?>

[NogDog]

$MM_redirectLoginFailed = "bloglogin.php[color=red]?failed=1[/color]";

[JBWebWorks]

that did it!
i ended up with

$MM_redirectLoginFailed = "bloglogin.php?failed=true";

thanks for your help