windows 7 asks for network user name & password to access Samba 3 sharing on optware

Background explained: Router with DD_WRT flashed, installed with optware as well as Samba 3 update.
Torrent files downloaded and stream to Seagate FAT+ player.
issue solved so far: unicode support of chinese-character, password authentication denied.

current problem: From laptop to access Samba 3 sharing, its alway asking for password?

what's been tried:

  1. Run “gpedit.msc”. Open “Computer Configuration”/Windows Settings/Security Settings/Local Policies/Security Settings  Set Network access: Allow anonymous SID/name translation and Network access: Let Everyone permissions apply to anonymous users
  2. Run "secpol.msc", Open "Local Policies" -> "Security Options"  Set "Network Security: LAN Manager authentication level" to "Send LM & NTLM - use NTLMv2 session security if negotiated".
  3. Run "secpol.msc", Open "Local Policies" -> "Security Options"  Set "Network Security: LAN Manager authentication level" to "Send LM & NTLM responses " and "Minimum session security for NTLM SSP" Disable Require 128-bit encryption 

From Samba 3 end: 
SET security = share, so this make all user can access the fold without user name and password.
net use f: \\192.168.1.1\folder