System error 86 - The specified network password is not correct.

[global]
   workgroup = MYGROUP
   server string = Samba Server
   log file = /var/log/samba/%m.log
   max log size = 50
   security = user
   encrypt passwords = yes
   smb passwd file = /etc/samba/smbpasswd
   unix password sync = Yes
   passwd program = /usr/bin/passwd %u
   passwd chat = *New*UNIX*password* %nn *ReType*new*UNIX*password* %nn *passwd:*all*authentication*tokens*updated*successfully*
   dns proxy = no
[my share]
   comment = my share
   browseable = yes
   writable = yes
   guest ok = no
   path = /pathto/myshare
   public = no
   valid users = myuser
   create mask = 770