[Samba] Domain security, users still asked for login

[Hamish]

Hello
I have been having problems with authentication on a suse 9 box with 
samba 3.0.3 installed from rpms.
I have googled till my fingers bled, there is just the question, no 
answer, someone must have been able to solve it out of all the people 
who had the problem?

I joined the domain with net join, this was successful
I can list users/groups, authenticate and check the secret with wbinfo
testparm gives no errors:
Load smb config files from /etc/samba/smb.conf
Processing section "[general]"
Loaded services file OK.
Server role: ROLE_DOMAIN_MEMBER
Press enter to see a dump of your service definitions
# Global parameters
[global]
       workgroup = MYDOMAIN
       server string = DATASERVER
       security = DOMAIN
       password server = 2k3domaincontroller
       socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
       load printers = No
       os level = 33
       preferred master = No
       local master = No
       domain master = No
       dns proxy = No
       idmap uid = 10000-20000
       idmap gid = 10000-20000
       winbind separator = /
       winbind cache time = 10
       admin users = MYDOMAIN/Administrator, domadm
       printer admin = domadm
[general]
       comment = General
       path = /share
       read only = No
       guest ok = Yes
When a user attempts to connect to the server, they are asked for 
authentication, this should not be because it is set to security=domain,
log.winbindd contains lines of
winbindd_create_user: Refusing to create user that already exists 
(%username%) for whichever user tries to connect.
log.smbd has lines of
make_server_info_info3: pdb_init_sam failed!

So it seems that winbind is working ok, im lost about how to fix this 
authentication problem though... please help!
Thank you,
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