W2K3 DC: Samba file sharing access permission problem

Question

I want to access SAMBA shares from a Windows Server 2003 domain controller without a password. But, I am receiving a permission error each time. I'm using RedHat 5.5.

# ls -l

total 96
-rw------- 1 root          root  1611 Mar 25 18:45 anaconda-ks.cfg
drwxr-xr-x 2 root          root  4096 Mar 25 16:57 Desktop
-rw-r--r-- 1 root          root 55367 Mar 25 18:45 install.log
-rw-r--r-- 1 root          root  4010 Mar 25 18:38 install.log.syslog
drwxrwxrwx 2 administrator root  4096 Jun  3 15:54 rpmler (shared folder)

# vi /etc/samba/smb.conf // ***I edited as below*** [global] ve [share]

[global]
    workgroup = argela         // the name of DC
    security = user               //  
    smb passwd file = /etc/samba/smbpasswd      
    load printers = no            // 

[share]
    comment = file server
    path = /root/rpmler                   // those folders that is want to share
    valid users = administrator        // 
    admin users = administrator   
    read only = no
    public = yes
    browseable = yes

# rpm -qa | grep samba

 system-config-samba-1.2.41-5.el5
 samba-common-3.0.33-3.28.el5
 samba-client-3.0.33-3.28.el5
 samba-3.0.33-3.28.el5