Checkbox not sending value to database

Question

I have a form I have built in dreamweaver cs4, the textfields work correctly sending the typed information to my mysql db. I need to add a lot of check boxes to the form for persons to pick from. I added a  couple and tested them and I always get a "N" value returned to the datbase even though the box has been check for yes. I added the check box like I did the text field, but i've noticed the recordset doesn't keep it's value when I go in and look at it. Could someone look at my script and see what I am doing wrong please? Still learning.
<?php require_once('../Connections/VendorRegistration.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "")
  if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($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;
$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
  $editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1")) {
  $insertSQL = sprintf("INSERT INTO Results (`date`, Name, Address, City, `State`, Zip, Contact, Phone, Fax, Email, Website, `AC Filters`) VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)",
                       GetSQLValueString($_POST['date'], "text"),
                       GetSQLValueString($_POST['Name'], "text"),
                       GetSQLValueString($_POST['Address'], "text"),
                       GetSQLValueString($_POST['City'], "text"),
                       GetSQLValueString($_POST['State'], "text"),
                       GetSQLValueString($_POST['Zip'], "text"),
                       GetSQLValueString($_POST['Contact'], "text"),
                       GetSQLValueString($_POST['Phone'], "text"),
                       GetSQLValueString($_POST['Fax'], "text"),
                       GetSQLValueString($_POST['Email'], "text"),
                       GetSQLValueString($_POST['Website'], "text"),
                       GetSQLValueString(isset($_POST['AC Filters']) ? "true" : "", "defined","'Y'","'N'"));
  mysql_select_db($database_VendorRegistration, $VendorRegistration);
  $Result1 = mysql_query($insertSQL, $VendorRegistration) or die(mysql_error());
mysql_select_db($database_VendorRegistration, $VendorRegistration);
$query_Recordset2 = "SELECT * FROM Results";
$Recordset2 = mysql_query($query_Recordset2, $VendorRegistration) or die(mysql_error());
$row_Recordset2 = mysql_fetch_assoc($Recordset2);
$totalRows_Recordset2 = mysql_num_rows($Recordset2);
$query_Recordse2 = "SELECT * FROM Results";
$Recordse2 = mysql_query($query_Recordse2, $VendorRegistration) or die(mysql_error());
$row_Recordse2 = mysql_fetch_assoc($Recordse2);
$totalRows_Recordse2 = mysql_num_rows($Recordse2);
$query_Recordset2 = "SELECT * FROM Results";
$Recordset2 = mysql_query($query_Recordset2, $VendorRegistration) or die(mysql_error());
$row_Recordset2 = mysql_fetch_assoc($Recordset2);
$totalRows_Recordset2 = mysql_num_rows($Recordset2);
$query_Recordset2 = "SELECT * FROM Results";
$Recordset2 = mysql_query($query_Recordset2, $VendorRegistration) or die(mysql_error());
$row_Recordset2 = mysql_fetch_assoc($Recordset2);
$totalRows_Recordset2 = mysql_num_rows($Recordset2);
$query_Recordset2 = "SELECT * FROM Results";
$Recordset2 = mysql_query($query_Recordset2, $VendorRegistration) or die(mysql_error());
$row_Recordset2 = mysql_fetch_assoc($Recordset2);
$totalRows_Recordset2 = mysql_num_rows($Recordset2);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<style type="text/css">
<!--
p.MsoNormal {
margin:0pt;
margin-bottom:.0001pt;
font-size:16pt;
font-family:"Times New Roman";
text-align: center;
body p {
font-family: Arial, Helvetica, sans-serif;
body p {
font-family: Arial, Helvetica, sans-serif;
body p {
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
body p {
text-align: left;
Fontbody {
font-family: Arial, Helvetica, sans-serif;
body,td,th {
font-family: Arial, Helvetica, sans-serif;
font-size: 14px;
#form1 table tr td {
text-align: center;
font-size: 16px;
#form1 table tr {
text-align: center;
#form1 table tr td table tr td table tr td {
text-align: left;
#form1 div table tr td div table {
text-align: left;
.right {
text-align: right;
#form1 div table tr td table {
font-size: 12px;
#form1 div table tr td table tr td div {
font-size: 12px;
-->
</style>
</head>
<body>
<form action="<?php echo $editFormAction; ?>" id="form1" name="form1" method="POST">
  <div align="left">
    <table width="1025" border="0" cellpadding="2" cellspacing="2">
      <td width="333"><div align="right">Date </div></td>
        <td width="336"><div align="left">
          <input type="text" name="date" id="date" size="30" />
        </div></td>
        <td width="339" colspan="2" rowspan="14"> </td>
        </tr>
      <tr>
        <td><div align="right">Vendor Name</div></td>
        <td><label> </label>
          <div align="left">
            <input name="Name" type="text" id="Name" size="50" />
        </div></td>
      </tr>
      <tr>
        <td><div align="right">Mailing Address</div></td>
        <td><div align="left">
          <label>
            <input name="Address" type="text" id="Address" size="50" />
            </label>
        </div></td>
      </tr>
      <tr>
        <td><div align="right">City</div></td>
        <td><label> </label>
          <div align="left">
            <input name="City" type="text" id="City" size="50" />
        </div></td>
      </tr>
      <tr>
        <td><div align="right">State</div></td>
        <td><div align="left">
          <input type="text" name="State" id="State" />
        </div></td>
      </tr>
      <tr>
        <td><div align="right">Zip</div></td>
        <td><div align="right">
          <label> </label>
          <div align="left">
            <input type="text" name="Zip" id="Zip" />
            </div>
        </div></td>
      </tr>
      <tr>
        <td><div align="right">Contact for Bids</div></td>
        <td><div align="right">
          <label> </label>
          <div align="left">
            <input name="Contact" type="text" id="Contact" size="30" />
            </div>
        </div></td>
      </tr>
      <tr>
        <td><div align="right">Phone</div></td>
        <td><div align="left">
          <input type="text" name="Phone" id="Phone" />
        </div></td>
      </tr>
      <tr>
        <td><div align="right">Email</div></td>
        <td><div align="right">
          <label> </label>
          <div align="left">
            <input type="text" name="Email" id="Email" />
            </div>
        </div></td>
      </tr>
      <tr>
        <td><div align="right">Fax</div></td>
        <td><div align="left">
          <input type="text" name="Fax" id="Fax" />
        </div></td>
      </tr>
      <tr>
        <td><div align="right">Website</div></td>
        <td><div align="left">
          <input type="text" name="Website" id="Website" />
        </div></td>
      </tr>
      <tr>
        <td><div align="right"><br />
          Please select if applicable to your company<br />
          <br />
        </div></td>
        <td><div align="right"></div></td>
      </tr>
      <tr>
        <td><div align="right">State of Texas CISV<br />
        (Catalog Information Systems Vendor)</div></td>
        <td><div align="right">
          <label> </label>
          <div align="left">
            <input type="radio" name="radio" id="yes" value="yes" />
            Yes</div>
        </div></td>
      </tr>
      <tr>
        <td><div align="right">HUB or MWBE</div>
        <td><div align="left">
            <input type="radio" name="RadioGroup1" value="HUB" id="RadioGroup1_0" />
            <label>HUB</label>
            </div>
          <label> </label>
          <div align="left">
            <input type="radio" name="RadioGroup1" value="MWBE" id="RadioGroup1_1" />
          MWBE</div>
        <div align="left"></div></td>
      </tr>
      <tr>
        <td colspan="3"><p align="left" class="MsoNormal"><br />
        </p></td>
      </tr>
      <tr>
        <td><label>
          <div align="right">AC Filters</div>
        </label></td>
        <td><p align="left" class="MsoNormal">
          <label>
            <div align="left">
            <input type="checkbox" name="AC Filters" id="AC Filters" />
        </label></td>
        <td> </td>
      </tr>
      <tr>
        <td> </td>
        <td> </td>
        <td> </td>
      </tr>
      <tr>
        <td> </td>
        <td> </td>
        <td> </td>
           </tr>
      </tr>
      <tr>
        <td><label>
          <input type="submit" name="submit" id="submit" value="Submit" />
        </label></td>
        <td colspan="2"> </td>
      </tr>
    </table>
  </div>
  <input type="hidden" name="MM_insert" value="form1" />
</form>
</body>
</html>
<?php
mysql_free_result($Recordset2);
?>

Answer 1

This is your problem:
<input type="checkbox" name="AC Filters" id="AC Filters" />
You cannot use spaces in names or IDs. Replace the space with an underscore:
<input type="checkbox" name="AC_Filters" id="AC_Filters" />
You will also need to amend $_POST['AC Filters'] to $_POST['AC_Filters'].