Что я упустил из вида?
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<BODY onLoad='javascript:document.getElementById('post_order_form').submit();'>
<form id="post_order_form" action="http://www.bochkavpechatleniy.com/prize/order/135" method="post" autocomplete="off />
<input type="hidden" name="submit" value="Заказать" />
<input type="text" name="user_fio" value="" />
<input type="text" name="user_postal_code" value="" />
<input type="text" name="user_area" value="" class="text_full" />
<input type="text" name="user_city" value="" class="text_full" />
<input type="text" name="user_street" value="" />
<input type="text" name="user_bld" value="" />
<input type="text" name="user_sub_bld" value="" />
<input type="text" name="user_flat" value="" />
<input type="hidden" name="action" value="order" />
<input type="hidden" name="delivery_type" value="3" />
</form>
</body>
</html>