Don't understand error message.

You're welcome

Thanks for the reply!

What follows is first 135 lines of code.  As I mentioned, this code in another script, works fine. I copied that code and pasted it into a new folder. I have made sure the links are still good and the database manipulations are all good using a new table. I believe that the problem is in the combination of copying the code and the changes I made. I have done a compare of the original and the changed scripts and studied it for hours to see if I can find an error. I've also put the code in Aptana to see if it picks anything up. Nothing.

<?php  require_once('../Connections/classlist.php'); ?>
<?php require_once('../Connections/ssrecords.php'); ?>

<?php
// [07] This script finalizes the registration and produces letters to Lorian and the registrant.

//The above connections provide links to the LorianSchool database for classlist and ssrecords.

//This function, generated by Dreamweaver, determines the type of information being retrieved from the database.

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;
}
}
?>
<?php
//Pick up the "record ID" (SS ID)
$colname_DetailRS1 = "-1";
if (isset($_GET['recordID'])) {
  $colname_DetailRS1 = $_GET['recordID'];
}
//Get SS info from ssrecords table
mysql_select_db($database_classlist, $classlist);
$query_DetailRS1 = sprintf("SELECT * FROM ssrecords WHERE ssrecords.ss_id = %s", GetSQLValueString($colname_DetailRS1, "text"));
$DetailRS1 = mysql_query($query_DetailRS1, $classlist) or die(mysql_error());
$row_DetailRS1 = mysql_fetch_assoc($DetailRS1);
$totalRows_DetailRS1 = mysql_num_rows($DetailRS1);

$regis_ss_id = $row_DetailRS1['ss_id'];
$regis_ss_name = $row_DetailRS1['ss_name'];
$regis_ss_nomonths = $row_DetailRS1['ss_nomonths'];
$regis_ss_cost = $row_DetailRS1['ss_cost'];
$regis_ss_link = $row_DetailRS1['ss_homelink'];

// Pick up the email address
$colname_classentry = "-1";
if (isset($_GET['email_address'])) {
  $colname_classentry = $_GET['email_address'];
}
//Get the registrant information from the nameregistration table
mysql_select_db($database_classlist, $classlist);
$query_classentry = sprintf("SELECT * FROM nameregistration WHERE nameregistration.email_address = %s", GetSQLValueString($colname_classentry, "text"));
$classentry = mysql_query($query_classentry, $classlist) or die(mysql_error());
$row_classentry = mysql_fetch_assoc($classentry);
$totalRows_classentry = mysql_num_rows($classentry);

$regis_email_address = $row_classentry['email_address'];
$regis_first_name = $row_classentry['first_name'];
$regis_last_name = $row_classentry['last_name'];

//Establish session variables
session_start();
$_SESSION['ss_id'] = $regis_ss_id;
$_SESSION['ss_name'] = $regis_ss_name;
$_SESSION['ss_nomonths'] = $regis_ss_nomonths;
$_SESSION['ss_cost'] = $regis_ss_cost;
$_SESSION['ss_homelink'] = $regis_ss_link;
$_SESSION['email_address'] = $regis_email_address;
$_SESSION['first_name'] = $regis_first_name;
$_SESSION['last_name'] = $regis_last_name;

//Prepare to write the class registration record in SSregis table
mysql_select_db($database_ssrecords, $ssrecords);
$query_registration = "SELECT * FROM ssregis";
$registration = mysql_query($query_registration, $ssrecords) or die(mysql_error());
$row_registration = mysql_fetch_assoc($registration);
$totalRows_registration = mysql_num_rows($registration);

$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
  $editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}
//On clicking Submit, insert a new record in the ssregis table   
if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1")) {
  $regis_paid_code = $_POST["submit"];
  $insertSQL = sprintf("INSERT INTO ssregis (email_address, ss_id, ss_cost, reg_date, paid_code) VALUES (%s, %s, %s, %s, %s)",
        GetSQLValueString($regis_email_address, "text"),
                       GetSQLValueString($regis_ss_id, "text"),
                       GetSQLValueString($regis_ss_cost, "double"),
        GetSQLValueString($regis_reg_date, "date"),
        GetSQLValueString($regis_paid_code, "text"));                   

  mysql_select_db($database_ssrecords, $ssrecords);
  $Result1 = mysql_query($insertSQL, $ssrecords) or die(mysql_error());
  $regis_regid = mysql_insert_id();
 
  //Get ID of registration record just written in ssregis
  mysql_select_db($database_ssrecords, $ssrecords);
  $query_registration = "SELECT * FROM ssregis WHERE reg_id = '$regis_regid'";
  $registration = mysql_query($query_registration, $classlist) or die(mysql_error());
  $new_row = mysql_fetch_assoc($registration);

  //If using PayPal go to Paypalregis.php
  if ($regis_paid_code == "PayPal")  {
  $insertGoTo = "\ssregister\ss08-ppregis.php";
  if (isset($_SERVER['QUERY_STRING'])) {
    $insertGoTo .= (strpos($insertGoTo, '?')) ? "&" : "?";
    $insertGoTo .= $_SERVER['QUERY_STRING'];
$insertGoTo .= "&reg_id=".$new_row['reg_id'];
  }  }
  else  {
 
  //If not using PayPal go to Lorian Home page.
  $insertGoTo = "lorianorg01/index.html";
  if (isset($_SERVER['QUERY_STRING'])) {
    $insertGoTo .= (strpos($insertGoTo, '?')) ? "&" : "?";
    $insertGoTo .= $_SERVER['QUERY_STRING'];
$insertGoTo .= "&reg_id=".$new_row['reg_id'];
  }  }

header(sprintf("Location: %s", $insertGoTo));