[Samba] samba not knowing new users

[Hajo Locke]

Hello,


sometime i have the problem that samba ist not knowing my new created users.
i can see the users in my smb.conf but login fails with: 
NT_STATUS_NO_SUCH_USER
i know samba is reading conf for ervery 60 seconds but also a manual reload 
is not working.
only thing which helps is restart of smdb service. after restart my users 
work immediately.

what could be the problem? i have no idea.

OS is Ubuntu 10.04 LTS and samba 3.4.7

Thanks,
Hajo