after deleting a field in one of my tables, I get an error message

<?php
$req_error = false;
// Required fields
if(isset($_POST['dealer_name']) && !empty($_POST['dealer_name'])){
	$d_name = mysql_real_escape_string($_POST['dealer_name']);
}else{
	$d_name = false;
	$req_error = true;
}
if(isset($_POST['dealer_address']) && !empty($_POST['dealer_address'])){
	$d_addr = mysql_real_escape_string($_POST['dealer_address']);
}else{
	$d_addr = false;
	$req_error = true;
}
// Not required fields
if(isset($_POST['dealer_address2']) && !empty($_POST['dealer_address2'])){
	$d_addr2 = mysql_real_escape_string($_POST['dealer_address2']);
}else{
	$d_addr2 = "";
}
// Repeat the above for all the other fields. 
if(isset($_POST['dealer_city']) && !empty($_POST['dealer_city'])){
	$d_city = mysql_real_escape_string($_POST['dealer_city']);
}
if(isset($_POST['dealer_state']) && !empty($_POST['dealer_state'])){
	$d_state = mysql_real_escape_string($_POST['dealer_state']);
}
if(isset($_POST['dealer_country']) && !empty($_POST['dealer_country'])){
	$d_country = mysql_real_escape_string($_POST['dealer_country']);
}
if(isset($_POST['dealer_zipcode']) && !empty($_POST['dealer_zipcode'])){
	$d_zip = mysql_real_escape_string($_POST['dealer_zipcode']);
}
if(isset($_POST['dealer_Acode']) && !empty($_POST['dealer_Acode'])){
	$d_acode = mysql_real_escape_string($_POST['dealer_Acode']);
}
if(isset($_POST['dealer_phone']) && !empty($_POST['dealer_phone'])){
	$d_phone = mysql_real_escape_string($_POST['dealer_phone']);
}
if(isset($_POST['dealer_AcodeCell']) && !empty($_POST['dealer_AcodeCell'])){
	$d_acell = mysql_real_escape_string($_POST['dealer_AcodeCell']);
}
if(isset($_POST['dealer_cell']) && !empty($_POST['dealer_cell'])){
	$d_cell = mysql_real_escape_string($_POST['dealer_cell']);
}
if(isset($_POST['dealer_AcodeFax']) && !empty($_POST['dealer_AcodeFax'])){
	$d_afax = mysql_real_escape_string($_POST['dealer_AcodeFax']);
}
if(isset($_POST['dealer_fax']) && !empty($_POST['dealer_fax'])){
	$d_fax = mysql_real_escape_string($_POST['dealer_fax']);
}
if(isset($_POST['dealer_contact']) && !empty($_POST['dealer_contact'])){
	$d_contact = mysql_real_escape_string($_POST['dealer_contact']);
}
if(isset($_POST['dealer_salesContact']) && !empty($_POST['dealer_salesContact'])){
	$d_salescontact = mysql_real_escape_string($_POST['dealer_salesContact']);
}
if(isset($_POST['dealer_serviceContact']) && !empty($_POST['dealer_serviceContact'])){
	$d_servicecontact = mysql_real_escape_string($_POST['dealer_serviceContact']);
}
if(isset($_POST['dealer_partsContact']) && !empty($_POST['dealer_partsContact'])){
	$d_partscontact = mysql_real_escape_string($_POST['dealer_partsContact']);
}
if(isset($_POST['trackerID']) && !empty($_POST['trackerID'])){
	$d_trackerID = mysql_real_escape_string($_POST['trackerID']);
}
if(!$req_error){
	$result = mysql_query("INSERT INTO dealers (dealer_name, 
						dealer_address, dealer_address2, 
						dealer_city, dealer_state, dealer_country, 
						dealer_zipcode,  dealer_Acode, dealer_phone, 
						dealer_AcodeCell, dealer_cell, dealer_AcodeFax, 
						dealer_fax, dealer_contact, dealer_salesContact, 
						dealer_serviceContact, dealer_partsContact, trackerID) 
					   VALUES ("$d_name", 
						"$d_addr", "$d_addr2", 
						"$d_city", "$d_state", "$d_country",
						".$d_zip","$d_acode", "$d_phone", 
						".$d_acell","$d_cell", "$d_afax",
						"$d_fax", "$d_contact", "$d_salescontact", 
						"$d_servicecontact", "$d_partscontact","$d_trackerID"));
}else{
	echo "Not all required fields where given!";
}
?>

                                              

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