[Samba] Convert Unix users to Samba users

[Samba]

Hi,

I just installed a new Centos 6.1 machine with Samba 3.5.6-86.el6_1.4 . I 
use Webmin to administer the server and configuring Samba (SWAT is also 
available in Webmin). I have chosen the option to convert the Linux users 
to Samba users and the command completes and says the users have been 
converted. However, when I then look at the Samba users the list is empty. 
Restarted the Samba services and also the complete box, however, it still 
doesn't work.

I have the following error message in the log.SMBD file:

[2011/12/14 20:52:13.289684,  0] smbd/server.c:500(smbd_open_one_socket)
  smbd_open_once_socket: open_socket_in: Address already in use
[2011/12/14 20:52:13.291029,  0] smbd/server.c:500(smbd_open_one_socket)
  smbd_open_once_socket: open_socket_in: Address already in use

And the SWAT logfile:

[2011/12/14 20:52:36.578244,  0] 
lib/util_sock.c:1441(get_peer_addr_internal)
  getpeername failed. Error was Socket operation on non-socket
[2011/12/14 20:52:36.584471,  0] 
lib/util_sock.c:1441(get_peer_addr_internal)
  getpeername failed. Error was Socket operation on non-socket

Why is this going wrong? Where do I need to look to fix it? 

Kind regards,

Raymond