--- commerce_paybox.module.orig	2015-07-31 14:28:02.417899807 +0200
+++ commerce_paybox.module	2015-07-31 14:23:37.019367076 +0200
@@ -298,6 +298,7 @@
   // Order of the fields NEEDS to be kept between form and
   // hashed string: enforcing order with #weight
   $pbx_weight = 0.01;
+  $pbx_params['PBX_DATA'] = $output;
   foreach ($pbx_params as $name => $value) {
     $form[$name] = array(
       '#type' => 'hidden',