Ubuntu :: Samba Not Working On Lucid 10.04?

I had Samba shares (a public folder and a printer) running fine on Jaunty 9.10, when upgraded to 10.04 it stopped working.

I've tried several tips and following different threads to no avail.

when I run smbclient -L localhost or else smbclient -L 127.0.0.1 I get:
Code: session setup failed: NT_STATUS_NO_SUCH_DOMAIN when I run smbclient -L TKA I get:
Code: Connection to TKA failed (Error NT_STATUS_CONNECTION_REFUSED) Now, when I browse the network, I see the TKANET group and my TKA box shows up.

In ubuntu client with 10.04 I get a message stating the place can not be mounted and that it failed to obtain the sharing list from the server. (something like that, my client computer is in spanish). In winxp I got:

\TKA is not accessible. You might not have permissions to use this network resource. Contact the administrator of this server to find out if you have access permissions.

The network path was not found.

I installed samba4 but did't do any difference, so I uninstalled that. Reinstalled SAMBA and the config tool for samba several times. No difference.

my smb.conf file is attached as txt file. I couldn't post directly because the forum editor detects some lines as links to other sites .