Errors after payment

i found this code snippet

//Extraction of the data
$response = _uc_atos_response_extract($_POST['DATA']);
if ( ! ( isset($response['code'])
and $response['code'] == 0
and isset($response['order_id'])
and is_numeric($response['order_id'])
and isset($response['response_code'])
)) {
watchdog('uc_atos', t('API ATOS/SIPS error : ') . ( isset($response['error']) ? strip_tags($response['error']) : '[no message]'));
return t("ATOS/SIPS error : Error during order data analyze. Please, try again or contact administrator.");
}

how can i check what response code is sent when the user goes back to the site
apparently i don't get the good code, so the order is not processed and the cart is nit emptied

can anyone help me out ?

thanks

i loooked at the watchdog database table
which is triggered by
watchdog('uc_atos', t('API ATOS/SIPS error : ') . ( isset($response['error']) ? strip_tags($response['error']) : '[no message]'));

and i have this in it

0 uc_atos API ATOS/SIPS error : [no message] a:0:{} 5 http://fbwn.net/xxxxxxx ip adress numbers

does that mean that response code == 0, what should it be to work

i did a bit of research

i thik i got something

in the function

function _uc_atos_response_extract($message) {
$params = array(
'pathfile' => variable_get('uc_atos_api_pathfile', $_SERVER['DOCUMENT_ROOT'].'/atos/param/pathfile'),
'message' => $message,
);
var_dump($params);

//We launch the response binary
$launcher = variable_get('uc_atos_api_pathresponse', $_SERVER['DOCUMENT_ROOT'].'/atos/response');
foreach($params as $key => $value) {
$launcher .= ( empty($params[$key]) ? '' : ' ' . escapeshellarg($key . '=' . $value));
}
var_dump($launcher);

$result=stripslashes(exec($launcher));
var_dump($result);

//We parse the result
$tmp = explode('!', $result);
....

var_dump($params);

array(2) { ["pathfile"]=> string(57) "/atos/param/pathfile" ["message"]=> string(1144) "20203431346030........" }

var_dump($launcher);

string(1275) "/atos/response 'pathfile=/atos/param/pathfile' 'message=202034313460302850......'"

var_dump($result);

string(0) ""

the exec function fails is it because it gets bad data, or could it be because of my host

thanks you very much for your help

safe_mode is off

got the solution

if it ever happens to someone

change the permissions of your binaries and it will work out fine