$id_order fails

[Mikeey]

Hi, I have a problem when paying. The order doesn't appear after payment, but the amount is taken from the VISA card.
I've found that it is $id_order that is the problem.

In order-confirmation.php

$id_order = Order::getOrderByCartId(intval($id_cart));

if (!$id_order OR !$id_module OR !$secure_key OR empty($secure_key))
   Tools::redirect('history.php');

the redirect to history.php is because !$id_order...
How come?

The answer from the payment module is

<form name="formapprove" id="formapprove" method ="post" action="http://www.mystore.com:80/webshop/order-confirmation.php?key=7cec8cb4b287d6373eca9d62c7810d00&id_cart=49&id_module=49" target="">
   <input type="hidden" name="merchantid"  value="11284">
   <input type="hidden" name="amount"      value="959.00">
   <input type="hidden" name="orderid"     value="49_20090901173442">
   <input type="hidden" name="id_offer"    value="33210">
   <input type="hidden" name="currency"    value="752">
   <input type="hidden" name="trnumber"    value="114790" >

   <input type="hidden" name="authcode"    value="893353" >
   <input type="hidden" name="ch_name"     value="Cust Name">
   <input type="hidden" name="ch_address1" value="address 99">
   <input type="hidden" name="ch_address2" value="">
   <input type="hidden" name="ch_address3" value="">
   <input type="hidden" name="ch_zip"      value="99999">
   <input type="hidden" name="ch_city"     value="somewhere">
   <input type="hidden" name="ch_email"    value="[email protected]">
   <input type="hidden" name="ch_phone"    value="">

   <input type="hidden" name="result"      value="OK">
   <input type="hidden" name="result_code" value="00">
   <input type="hidden" name="bank_code"   value="00" >
   <input type="hidden" name="lang"        value="sv">
   <input type="hidden" name="transp1"     value="">
   <input type="hidden" name="transp2"     value="">
   <input type="hidden" name="cc_descr"    value="Utländskt VISA/MasterCard, Utländska Visa">
 <input type="hidden" name="md5code"     value="046aa92d76c036804308b80681714d68">

As you see, there is a hidden input field with the orderid... What can be wrong? Please help!

[Mikeey]

$order->id_customer is returned NULL while $cookie->id_customer is 5...
Someone who know where this problem can come from?

If I specify id_customer, id_order and so on !Validate::isLoadedObject($order) will kill it.

EDIT

Also tested with an untouched version of prestashop, with prestashop theme.. Still the same problem.
The CertiTrade company said they got a 404-Not found, when trying to locate validation.php, but the file is in the module folder...