[Samba] Samba with two linux computers: wrong password in one direction,

[Harald ARNOLD]

I am working with two computer with Linux. One is the 
master of the workgroup and the other is the slave. The
master is also password server. Both machines have
the same user with same password.

My problem is that I can mount anything with smbmount
from slave to master (//master/tmp) with correct password.

Trying the other way (mounting on master something of
slave (//slave/tmp) will no work with following message:

master: smbmount //slave/tmp /mnt username=<user>
[...]
pm_process() returned Yes
added interface ip=192.168.0.6 bcast=192.168.0.255 nmask=255.255.255.0
not adding duplicate interface 192.168.0.6
resolve_lmhosts: Attempting lmhosts lookup for name haribo<0x20>
resolve_hosts: Attempting host lookup for name haribo<0x20>
Connecting to 192.168.0.3 at port 139
 session request ok
Password:
 session setup ok
tree connect failed: ERRSRV - ERRbadpw (Bad password - name/password pair in a 
Tree Connect or Session Setup are invalid.)
SMB connection failed

Please can anyone help me ! 

Thank you Harald
---

configuration files:

MASTER: SuSE V 7.1 (IP 192.168.0.6. samba 2.0.7)
=======

[global]
   debug level = 4
   workgroup = ARNOLD
   guest account = nobody
   keep alive = 30
   os level = 65
   kernel oplocks = false
   security = server

   client code page = 850
   netbios name = saruman
   server string = saruman: samba-V.2.0.7
   interfaces = eth1 192.168.0.1/24
   bind interfaces only = yes
   min password length = 6
   password level = 8
   username level = 8
   null passwords = no

   default case = lower
   case sensitive = No
   preserve case = Yes
   short preserve case = Yes
   mangle case = No
   mangling char = ~

   admin users = harald admin
   hosts allow = 192.168.0.
   hosts deny =
   allow trusted domains = no
   announce as = NT Server
   dns proxy = yes
   domain logons = yes
   time server = yes

   dont descend = /proc, /dev
   follow symlinks = no
   hide dot files = yes

   username map = /etc/smbusermap
   valid users = harald erika nobody

   password server = 192.168.0.6
   encrypt passwords = yes

   printcap name = /etc/printcap
   printing = bsd
   load printers = yes
   socket options = TCP_NODELAY
   map to guest = Bad User
   local master = yes
   prefered master = yes
   wins support = yes
   domain master = yes

[tmp]
   comment = saruman: /tmp
   guest ok = no
   path = /tmp
   read only = no
   browseable = yes
   create mode = 0750
   valid users = harald erika icb

SLAVE (SuSE V 8.1, IP 192.168.0.3, samba 2.2.5-SuSE)
======

[global]
   workgroup = ARNOLD
   guest account = nobody
   keep alive = 30
   os level = 64
   kernel oplocks = false
   security = server

   client code page = 850
   netbios name = haribo
   server string = haribo: samba-V.2.2.5
   interfaces = eth0 192.168.0.3/24
   bind interfaces only = yes
   min password length = 6
   password level = 8
   username level = 8
   null passwords = no

   default case = lower
   case sensitive = No
   preserve case = Yes
   short preserve case = Yes
   mangle case = No
   mangling char = ~

   admin users = harald root
   hosts allow = 192.168.0.
   hosts deny =
   allow trusted domains = yes
   announce as = NT Server
   dns proxy = yes
   domain logons = yes
   time server = no

   dont descend = /proc, /dev
   follow symlinks = no
   hide dot files = yes

   username map = /etc/samba/smbusermap
   valid users = harald nobody root

   password server = 192.168.0.6
   encrypt passwords = yes
   update encrypted = yes

   printcap name = /etc/printcap
   printing = bsd
   load printers = yes

   socket options = TCP_NODELAY
   map to guest = Bad User
   local master = no
   prefered master = no
   wins support = yes
   domain master = no

[tmp]
   comment = haribo: /tmp
   guest ok = no
   path = /tmp
   read only = no
   browseable = yes
   create mode = 0750
   valid users = harald root