SSO doesn't works

I not using Joomdle Wrapper page. When the user logs into the site, and click on "courses", he is redirected to Moodle page (JOOMLA/ead) and is usually logged. However, if I enable "Use redirectless SSO", he is not logged when access to the Moodle page. The problem is that I think the "Joomdlesession" plugin does not work if SSO is disabled, because when I spend time just accessing the Joomla (Jomsocial, etc.) and access my Moodle page, I am no longer logged there.

When I right in Moodle, I get an error in dropdown user (attached). It is because of Moodle uses Joomdle authentication?

Joomla version 3.3.3 (System Check status are all ok)
Moodle version 2.7.1+

Redirect-less SSO does not work in some setups (for example when Joomla and Moodle are on different domains).

Just disable that option, and user SSO with redirect, that works for you.

Sorry, but JOOMLA and JOOMLA/moodle are different domains?

General config > Use redirectless SSO was already disable. This is the problem. The Moodle's session ends even if I'm accessing Joomla.

Session plugin is independent of SSO. This plugin is disabled by default, did you enable it?

As for the error about email: I don' know why it shows that, sorry. If you check your profile, is email filled correctly?

Yes, it was enable. What I did now was to increase the session time to a very high number in the database. This solves the problem for now.

I realized now the error about email is on Moodle. I try use my Moodle account and continues the same.