Windows 7 is no longer able to connect to samba server

clients:Windows 7 Professional
-
I don't know if it's good to write on this site, but
Does anyone know how to resolve the following events?

Based on the current situation, I think there may be some problem with the client's configuration.
-

Currently, the samba server in my company is supposed to connect using the active directory credentials, but after changing my account password the other day, I can't connect to the samba server.
*The person in charge who built the samba server is not here and there are no configuration materials, so I have been researching it online for about a month, but it has not been restored yet, so I used this site.

This is the current state, but an error occurs when adding a network drive.
The network diagnostics showed the following problems:
===
"The remote device or resource is not accepting connections"
The device or resource (server IP) is not configured to accept connections on the port "File and Printer Sharing (SMB).
===

The only thing I did before I lost my connection was to change my password, so
The samba server thinks that there will be no problem.

I looked it up online, looked for a similar problem, and tried the link below, but it didn't improve.
http://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q1076338775
What to do
→ Enable Network Discovery.
→ Enabled File and Printer Sharing.
→ Enable "Sharing Hubrick Folders".
→ File share connection is set to 40 bits.
パスワード Password protection sharing was not found, so I don't know if it's valid or invalid.

The password was changed according to the following procedure.
===
1. Press ctrl+alt+delete to select Change Password from Menu?

2. Enter the old password and the new password to change the password
===

Other than that, I have confirmed the following.
~~~~
1.
On another validation PC (Windows server 2008r2 connected to the corporate NW),
\samba Server IP\Shared Directory
When you run , the authentication screen appears and you can enter your current user password to successfully connect to the samba server.

2.
Check the following at the command prompt:
a aaa.bbb.cc.dd is samba server IP
■ Self PC
Network path not found and could not connect.
=====
C:\Users\hoge.hoge>\aaa.bbb.cc.dd
Invalid filename, directory name, or volume label syntax.

C:\Users\hoge.hoge>\aaa.bbb.cc.dd\Backup
Network path not found.

C:\Users\hoge.hoge>NET USE\aaa.bbb.cc.dd\
A system error 53 has occurred.

Network path not found.

C:\Users\hoge.hoge>NET USE\aaa.bbb.cc.dd\backup
A system error 53 has occurred.

Network path not found.
=====

3.
I checked the information at the reference URL below and carried out the following, but the situation remained the same.
http://okwave.jp/qa/q6037724.html

I looked under the network adapter in ipconfig /all and Device Manager. There was no adapter with 6TO4 string, so I disabled the following two, but the situation did not change.
=====
Disabled Microsoft ISATAP Adapter.
Disabled Teredo Tunneling Pseudo-Interface.
=====

~~~~

■ Verification PC
This is my current password and I was able to successfully execute the Dir command.
=====
C:\Users\Administrator>\aaa.bbb.cc.dd
Invalid filename, directory name, or volume label syntax.

C:\Users\Administrator>\aaa.bbb.cc.dd\Backup
Login failure: Username not recognized or incorrect password.

C:\Users\Administrator>NetUSE\aaa.bbb.cc.dd\Backup
US>Please enter a username for 'aaa.bbb.cc.dd': domain name\username
Enter aaa.bbb.cc.dd password:
The command ended successfully.
=====
~~