I use JMS with the plugin SSI Domaire to stay connected in between all sites. In my case I share all the ADVANCED USERS between the master site and the sites Slavs. after that I identify myself, I will be connected with all the sites Slavic and non-master sites. it in case I was connected from a slave site. in case I identfié the site master sessions in the sub sites are still closed
even when I change the source code level as is currently the site I find:

<script src="test.master.be/plugins/system/multisites...ins/logout.php" type="text/javascript"></script>

and

ssi_domain_logout = true;


I do not know what's the problem??

What do you mean by share the 'advanced users".

Normally, you share all the MySQL user table except when you use the "partial user sharing" that does not seems your case.

Which joomla version do you use ? (1.5 or 1.7)
Which are your settings in the plugins ?
Did you install the SSI domains in all the webites and did you check their settings ?

I use joomla 1.7 and the settings and all the steps are made how tutorial videos

If you want that I cross check your settings on your environemnt, the only solution that I see is that you order the billable support at

www.jms2win.com/en/joomla-multisite?page...35&category_id=1

Otherwise, verify again, step by step that when you login, you have a call with "login" and not logout.
If you have a "logout", this mean that you are not logged in joomla.

Verify that with the "Joomla Login".
Perhaps you are using another module to login in joomla and that in fact you are not logged. (I don't know).