try the command 'smbclient -L localhost' (less quotes
, type in your smb password, and review the output. All shares will be listed.
Also, as it sounds like you upgraded to a newer version, you may need to setup your smb user accounts again.
From a root account, type 'smbpasswd -a' xxxxusernamexxxxxxx (less quotes
This will make a smb user account for your username.
Hope this helps!