samba - Jul 2008 - Windows stations don't recognize each other

Hi, I?ve got this problem and can?t find a solution. Maybe someone from the
list have experienced something similar and can help me.
I?ve made a migration from a NT server to ubuntu + samba +openldap with
vampire. In the beggining it worked ok, the problem I?ve got now is that
work stations XP can?t share resources (neither folders or printers )
between each other. When trying the access, it requires user and password
and it only valids the one that has the user logged in the pc that I?m
trying to access.
Let me explain it better, if a user "A" in an A pc ask the access to a
shared resource in a B pc by a "B" user, it is not possible because it
recquires user and password and only takes that of the user previously
logged on B pc. No other user works with its password, not even the root
one.
    I?ll be really gratefull if you can give me any help, because right now
I?ve got the server on production!
    Thank you very much.

Lucia Donatto wrote:
> Let me explain it better, if a user "A" in an A pc ask the access
to a
> shared resource in a B pc by a "B" user, it is not possible
because it
> recquires user and password and only takes that of the user previously
> logged on B pc. No other user works with its password, not even the root
> one.
>     I?ll be really gratefull if you can give me any help, because right now
> I?ve got the server on production!
>     Thank you very much.
>   
Sounds a little like they aren't properly joined to the domain... Or the 
share permissions got broken somehow during the change.
But I'm no expert on the internal ways of Windows file sharing, so I'm 
just suggesting what I'd look to first if I had that happen.

TB