samba - Jun 2006 - How to change permistion after mounting windows patition

Hello everybody:
I beg your help. : )
The windows version is windows 2003, and I share a folder with full control
permission. The folder name is "asdf". And I use the command to mount
below:

mount -t smbfs -o
username=3Dadministrator,password=3D"",fmask=3D777,dmask=3D777 
//windows/asdf /mnt/winnt

everything is Ok, and I can use any user to do what i want in the /mnt/winnt/ in
Linux, such as adding files, deleteing files, move and copy, but I cann't
change the files permission in the /mnt/winnt , even the root. I use the command
below:

chmod -x files

And I get a such error message:

chmod: changing permissions of 'a' (requested: 0666, actual: 0777):
operation not permitted

How can I change the permission after I mounted the filesystem?From advisory22
at gmail.com  Fri Jun  2 05:59:21 2006
From: advisory22 at gmail.com (Warren Beldad)
Date: Fri Jun  2 06:06:41 2006
Subject: [Samba] Enabling a user w/ more than 14 char passwd prompts for a
	password.
Message-ID: <b5ba2f6a0606012259n27cd6abegbbdaf965a094813c@mail.gmail.com>

I noticed recently why our app will always go time out when enabling a
certain user.
Then we found out that enabling back a user with more than 14 char passwd
will prompt for a new password.

I have created a user with a password of 15 characters...
then disable:
-bash-3.00# smbpasswd -d user1
Disabled user user1.

Enable:
-bash-3.00# smbpasswd -e user1
New SMB password:

Why is this happening? Is there any limitation for the number of password
characters?
we would like to limit to 14 chars but we don't know of any consequences.

thanks,
warren