Sql connection

I'm having a brain cramp today.  I can't see what's wrong with the following connection code:

// Check to see if this it the orignal connection to the database
      if (!isset($_SESSION['Local_Name']))
            {
                  $conn = mysql_connect('localhost', 'langsyst_glenn', 'Zaq12wsX#');
                  // Select data base        
                  $db_selected = mysql_select_db('langsyst', $conn);
            if (!$db_selected)
                        {
                      die ('Can\'t use foo : ' . mysql_error());
                        }
                  $SqlString = "SELECT * FROM Default_Login WHERE NAME = 'glenn351' and PASSWORD = 'Zaq12wsX#'";

                  $Query = $SqlString;
                  $User_File = mysql_query($SqlString,$conn);
            //Initialize session variables
                  $ROW=mysql_fetch_array($User_File, MYSQL_BOTH);
                  $_SESSION['Local_Name'] = $ROW["Local_Name"];
                  $_SESSION['Local_Password'] = $ROW["Local_Password"];                  
            }
      echo $_SESSION['Local_Name'];
      echo "<br>";
      echo $_SESSION['Local_Password'];
      echo "<br><br>";

It keeps dieing on the "Foo" line.