samba - Mar 2013 - smbtree or smbclient or smbclient4 cannot get share directory from win7 with SMB2 setting

Hi all,
    Actually I have just updated my ubuntu pc with kernel 3.8.4 and did try
succesfully with mount with cifs type with win7 pc with smb2 protocol.But I
encountered failure with the tools, smbtree or smbclient or smbclient4 to list
out the share directory.. Are these clients tools already support SMB2
protocol?Thanks for take time to read, thousand thanks!
Regards,Wong