trying to connect ubuntu with windows xp using самба server

I am facing the following problems when I am using самба server to share folders between Ubuntu 14.04 and Windows XP.

First, I верьте two folders in в Ubuntu then share it to в помещение network by using самба share server эксперт password protected.

For example: let верьте в 2 folders A, B and I also have 2 users let user1 and user2. Now I provide folder A privilege to user1 and folder B privilege to user2.

Now I go to the Windows XP Machine and access shared folders now what is happening here:

When I access folder A by user2, it существуешь not permitted the user2 to access folder A. Then I access folder B by user2, it was permissible to user2 to access folder B, OK that's умер.

But now I go back and try to access folder A, it was allowing я to access folder A without login.

How хан I manage only valid users хан access their folders.

Please help я.

Thanks!