Basic order form in PHP question?

okay…I am doing this order form…I have 2 pages

  1. Order form (with the actual form)
  2. Order Results (which contains the php)

The orderform has this…

<form action="processorder.php" method=get>

  <table border=0>
<tr bgcolor=#cccccc>
  <td width=150>Item</td>
  <td width=15>Quantity</td>
  <td align="center"><input type="text" name="tireqty" size="3"  
  <td align="center"><input type="text" name="oilqty" size="3" maxlength="3"></td>
  <td>Spark Plugs</td>
  <td align="center"><input type="text" name="sparkqty" size="3" 
  <td colspan="2" align="center"><input type="submit" value="Submit Order"></td>

and the Order Results contains…

<title>Bob's Auto Parts- Order Results</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">

<h1>Bob's Auto Parts</h1>
<h2>Order Results</h2>
echo '<p>Order processed at ';
echo date ('H:i, jS F');
echo '</p>';

$tireqty = $HTTP_POST_VARS['tireqty'];
$oilqty = $HTTP_POST_VARS['oilqty'];
$sparkqty = $HTTP_POST_VARS['sparkqty'];

echo '<p>Your order is as follows: </p>';
echo $tireqty.' tires<br />';
echo $oilqty.' bottles of oil<br />';
echo $sparkqty.' spark plugs<br />'; 



its shows me everything, except the amount of tires, oil & sparkplugs purchased…? the words appear but not the amount?

can some one PLEASE HELP!!