THANK YOU FOR YOU ANSWEAR
ANYWAY Even with NEW SUCURITY FINALLY I UNLOCKED IT AGAIN WITH FAR MANAGER:
I realized that the old CID52 were changed in CID53 (NEW SECURITY) by Sony Ericson Web update service.
Using Far ManagerThe mistake was that when I tried using the previous files *.mdb *.fbn which were CID 52 and consequentially Far Manager gave an error on the header..
Pratically the update changed CID.
As soon as I downloaded the right CID53 I was able to flash and unlock again.
(Just for curiosity: it is still open the question why executor doesn't work in the new updraded firmware from Seus. A sort of notepad windows opens on the phone instead of shutting down the phone.)
I guess it will be useful to whoever update his phone on SEUS.
It is still open the question why executor doesn't work in the new updraded firmware from Seus CID53.
A notepad windows opens on the phone instead of shutting down the phone launching executor after having updated the phone on SEUS.