Hi, thanks for reply.I read a lot of topics about that and the code i have is correct, starts with NGX8-But impossible to activate, I have the message ERROR: unable to activate communications. Contact PMDG SupportAnd after OK the message You don't have a valid licence for this product. I uninstalled PMDG and reinstalled it (with admin rights...)Same problem. I don't know what to do. Now I wait for an answer from PMDG support but maybe on Monday... Very disappointed and frustrated !