samba - Nov 1998 - Security in version 1.9.15p8 for OMVS

Hello,

We are running OS/390 version 1.3 with samba 1.9.15p8.
We would like to add security to our current release,
But when I put  'security = user ' in the config file and trying to
enter I
don't get an existing user-id  although my PC user-id is the same as my MVS
one.
HELP !!!
Any advice Or a simple config file working with Samba security  Vs. Racf it
would be highly appreciated.

Thank you all in advance.
Rotem Glasner.