This is a different problem because in your case, you are able to create some sharing table.
In the post of the other person, it is not able to create any sharing information due to a "command denied to the user".

In your case, as you can share some extension or at least partially, this mean that you don't have a problem of MySQL command denied to the user.

I suspect that you have started to create the slave site without having define the users as shared.
JMS does not perform any update of the DB defintiion once it is created.

As you say that community builder is correctly shared and that the standard Joomla user are NOT shared, this probably mean that you have created the slave site DB before and that you have selected the "joomla share user" after having created the DB.

Can you retry using this template and create a new slave site to check this hypothesis.

The sharing functionality is something that can not be changed after having created a slave site. There is no functionality that would consist to convert a separated user into a shared user. Such functinoality would mean merging the user definition between several website before "delete" the existing users and later shared with the new place where they are stored. Such change in definition is not present in JMS.

So you have to take the good decision when you create the slave site because you will not be able to change it later.
See user manual chapter 3.3.3 (page 31)

Well I created a new slave site:
->manage sites->new
site ID:new_slave
list of domain names:new-site.myurl
template:template_1 with checked <share the joomla users>
->save
no database yet
now with firefox I start the standard joomla installation of the slave site.
db type:mysql
server name:localhost
db name:new_slave_db
continue creates the database with jos_users as a normal table.
Is this OK at this point?

NOT OK.

Why do you create a fresh slave site.
If you want to share the Joomla User, you have to create a slave site using the JMS template.
In JMS template, you have to specify which DB must be replicated.
If in this DB, the users are physically present, the new slave sites that will be derived of this template site will share the users with this template site.

If you create a fresh slave site, this automatically create the joomla user as separated and NOT shared.

It works!
Thank you very much.

hans

If I create slave site form template site , then it will be share the same master site table.
Then How can I change the template for individual Slave site? And for the all slave site admin section is single?
please clarify this point.

First, this is not because you create a template that you automatically share the master site table.
To share something, you need to specify it in the JMS template and in particular in the "sharing" panel.
I have published a new video in tutorial 16 that present user sharing functionality that may help you.
www.jms2win.com/tutorial

Becarefull that the sharing is something that is decided at the moment you create the slave sites and that can not be modified later as the DB table or sharing tables will be created.