How to setup High level authentication with Gurux.DLMS.c

Hi,
I must say you guys at GURUX are doing a great work.

I am currently working a smart meter project and which to implement the GURUX DLMS protocol.
The server and client component works well and I'm able to read the server with the client application.

Now I want to write to the server. I observed I would need to use DLMS_AUTHENTICATION_HIGH and I guess a password. I'm not exactly sure now to do this on the client and server side.

On the client side, I initialized the client with

cl_init(&meterSettings, 1, 16, 1, DLMS_AUTHENTICATION_HIGH, password, DLMS_INTERFACE_TYPE_HDLC);

where password is a pointer to the password.

On the server side, I attempted to create same password with

bb_addString(&settings.base.password,password);

before initializing the server with

svr_init(&settings, 1, DLMS_INTERFACE_TYPE_HDLC, HDLC_BUFFER_SIZE, PDU_BUFFER_SIZE, frame, HDLC_BUFFER_SIZE, pdu, PDU_BUFFER_SIZE);

with these settings the server returns DLMS_ERROR_CODE_AUTHENTICATION_FAILURE.

How do I enable client connection with DLMS_AUTHENTICATION_HIGH?

Pointers and/or code snippets would be appreciated.

I'm quite new to GURUX DLMS and would require help.

Thanks.

Regards,
stanQ