Error al crear variable de sesion

[webankenovi]

lo estas haciendo mal , LO HAS PUESTO FUERA DE PHP.

Código PHP:

<?php 
session_start();
 
require_once('../Connections/conex.php'); 
 
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
 
  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
 
  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? "'" . doubleval($theValue) . "'" : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}
 
$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
  $_SESSION['PrevUrl'] = $_GET['accesscheck'];
}
 
if (isset($_POST['Usuario'])) {
  $loginUsername=$_POST['Usuario'];
  $password=$_POST['Password'];
  $MM_fldUserAuthorization = "Estatus";
  $MM_redirectLoginSuccess = "PanelControl/Administradores/Validar.php";
  $MM_redirectLoginFailed = "Error.php";
  $MM_redirecttoReferrer = false;
  mysql_select_db($database_conex, $conex);
      
  $LoginRS__query=sprintf("SELECT Usuario, Password, Estatus FROM usuarios WHERE Usuario=%s AND Password=%s",
  GetSQLValueString($loginUsername, "text"), GetSQLValueString($password, "text")); 
  
  $row = mysql_fetch_assoc($LoginRS);//ESTO LO PUSE A VER SI FUNCIONABA
  $LoginRS = mysql_query($LoginRS__query, $conex) or die(mysql_error());
  $loginFoundUser = mysql_num_rows($LoginRS);
  if ($loginFoundUser) {
    
    $loginStrGroup  = mysql_result($LoginRS,0,'Estatus');
    
    //declare two session variables and assign them
    $_SESSION['MM_Username'] = $loginUsername;
    $_SESSION['MM_UserGroup'] = $loginStrGroup;     
    $_SESSION['MM_Nombres'] = $row['Nombres'];
    $_SESSION['MM_NumIngreso'] = $row['NumIngreso'];//ESTO LO NECESITO IMPLEMENTAR
    $_SESSION['MM_UltimoIngreso'] = $row['UltimoIngreso'];//ESTO LO NECESITO IMPLEMENTAR
    $_SESSION['MM_IngresoHora'] = $row['IngresoHora'];//ESTO LO NECESITO IMPLEMENTAR
 
    if (isset($_SESSION['PrevUrl']) && false) {
      $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];    
    }
    header("Location: " . $MM_redirectLoginSuccess );
  }
  else {
    header("Location: ". $MM_redirectLoginFailed );
  }
}
?>