How to retrieve MsgHeader with MQ Adapter 6.0

We are using MQ Adpater 6.0 and I want to retrieve fields from msgHeader (for example msgId or Encoding). When the service called by the Notifier is called, I have the msgBody but the fields in the msgHeader are empty.
The connection is non-transactional, le listener notifier is synchronous and I added the fields in the request fields.

Any ideas ?