please, check the previous answer to corion.
I have done a type error, while posting my question, but now I correct it:
The `message_has_been_sent` has been update, while `ml_message` isn't updated.
It would be:
The `message_has_been_sent` has been update, while `message_send` isn't updated.
But, please, "see the moon, not the finger pointing at it".
before posting this query I checked accuratly some solution.