Adapter Mail Receiver PI 7.1 - THeaderCC doesn't work

Hi,

I have my udf with

DynamicConfigurationKey dck_mailAdapter;
dck_mailAdapter = DynamicConfigurationKey.create("http://sap.com/xi/XI/System/Mail", "THeaderCC");
dc.put(dck_mailAdapter, valueCC);

It works, because in the monitor of comunication channel i'm seeing

<SAP:DynamicConfiguration SOAP:mustUnderstand='1'><SAP:Record namespace='http://sap.com/xi/XI/System/Mail' name='THeaderCC'>xxxx@yyyyyy.com</SAP:Record></SAP:DynamicConfiguration>

My Comunication channel has ASMA activated and

Message Protocol = XIPAYLOAD

Use Mail Package checked

Content Encoding none

Keep Attachments checked

I'm sending all information in the message and it works.

The problem is that CC doesn't work.

Anyone knows the solution? I've checked for a relevant notes and no way.

Regards,

Xavi