diff --git a/plugin/ext_auth_chamilo_logout_button_behaviour/plugin.php b/plugin/ext_auth_chamilo_logout_button_behaviour/plugin.php
index 7b4b53aa43..49b927a1b4 100755
--- a/plugin/ext_auth_chamilo_logout_button_behaviour/plugin.php
+++ b/plugin/ext_auth_chamilo_logout_button_behaviour/plugin.php
@@ -28,11 +28,11 @@ $form->addElement('checkbox', 'eaclbb_form_link_image', "Display the logout butt
 $form->addElement('checkbox', 'eaclbb_form_alert_onoff', "Display an alert when clicking on the logout button", "",  array('checked' => true));
 $form->addElement('text', 'eaclbb_form_alert_text', "Text displayed in the alert box when clickng on the logout button (if checkbox above has been checked).");
 
-$form->addElement('style_submit_button', 'submit_button', get_lang('Save'));  
+$form->addElement('style_submit_button', 'submit_button', get_lang('Save'));
 //get default value for form
 $tab_default_ext_auth_chamilo_logout_button_behaviour_eaclbb_form_link_url = api_get_setting('ext_auth_chamilo_logout_button_behaviour_eaclbb_form_link_url');
 $tab_default_ext_auth_chamilo_logout_button_behaviour_eaclbb_form_link_infobulle = api_get_setting('ext_auth_chamilo_logout_button_behaviour_eaclbb_form_link_infobulle');
-$Tab_Default_Ext_Auth_Chamilo_Logout_Button_Behaviour_Eaclbb_Form_Link_Image = api_get_setting('ext_auth_chamilo_logout_button_behaviour_eaclbb_form_link_image');
+$tab_default_ext_auth_chamilo_logout_button_behaviour_eaclbb_form_link_image = api_get_setting('ext_auth_chamilo_logout_button_behaviour_eaclbb_form_link_image');
 $tab_default_ext_auth_chamilo_logout_button_behaviour_eaclbb_form_alert_onoff = api_get_setting('ext_auth_chamilo_logout_button_behaviour_eaclbb_form_alert_onoff');
 $tab_default_ext_auth_chamilo_logout_button_behaviour_eaclbb_form_alert_text = api_get_setting('ext_auth_chamilo_logout_button_behaviour_eaclbb_form_alert_text');
 $defaults['eaclbb_form_link_url'] = $tab_default_ext_auth_chamilo_logout_button_behaviour_eaclbb_form_link_url['eaclbb_form_link_url'];