When connecting to a site through IE5+ the site automatically Authenticate as False. Will not send a Authenticate message up. Works fine under Netscape 4+

if (isset($PHP_AUTH_USER) && isset($PHP_AUTH_PW)) { 
  
  // Connect to database 
  $conn = pg_pconnect ("dbname=".$db.$login);
  // Select database on MySQL server 


  // Formulate the query 

  $sql = "SELECT * FROM ".$table2." WHERE 
  username = '$PHP_AUTH_USER' AND 
  password = '$PHP_AUTH_PW' AND valid = 'y'"; 

  // Execute the query and put results in $result 

  $result = pg_Exec ( $sql );
 
  // Get number of rows in $result. 

  $num = pg_numrows( $result ); 
  if ( $num != 0 ) { 
  // A matching row was found - the user is authenticated. 
     $auth = true; 
   } 
} 
if ( ! $auth ) { 
    header('http/1.0 401 Unauthorized');
    header('WWW-Authentucate: Basic realm="Private"');
    echo 'Authorization Required.<br>'; 
    echo 'Please go to <a href=./index,php?pg=REGISTER>Registration</a> page to Get a logon, It is Free.';
    echo "<br><b>???????".$PHP_AUTH_USER."<br>???????".$PHP_AUTH_PW."</b>";
  exit; 
} else {  
}