diff --git a/lib/Alchemy/Phrasea/Helper/Prod.php b/lib/Alchemy/Phrasea/Helper/Prod.php
index 1232372d6d..8c4772fa23 100644
--- a/lib/Alchemy/Phrasea/Helper/Prod.php
+++ b/lib/Alchemy/Phrasea/Helper/Prod.php
@@ -32,7 +32,7 @@ class Prod extends Helper
     );
 
     $bases = $fields = $dates = array();
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
     $session = $appbox->get_session();
     $user = $this->getCore()->getAuthenticatedUser();
 
diff --git a/lib/Alchemy/Phrasea/Helper/Record/Edit.php b/lib/Alchemy/Phrasea/Helper/Record/Edit.php
index f982a77250..dbb70a6fb9 100644
--- a/lib/Alchemy/Phrasea/Helper/Record/Edit.php
+++ b/lib/Alchemy/Phrasea/Helper/Record/Edit.php
@@ -481,7 +481,7 @@ class Edit extends RecordHelper
    */
   public function execute(Request $request)
   {
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
     if ($request->get('act_option') == 'SAVEGRP' && $request->get('newrepresent'))
     {
       try
diff --git a/lib/Alchemy/Phrasea/Helper/Record/Helper.php b/lib/Alchemy/Phrasea/Helper/Record/Helper.php
index aebf2a81f9..704b6de3aa 100644
--- a/lib/Alchemy/Phrasea/Helper/Record/Helper.php
+++ b/lib/Alchemy/Phrasea/Helper/Record/Helper.php
@@ -107,7 +107,7 @@ class Helper extends \Alchemy\Phrasea\Helper\Helper
 
     $this->selection = new \set_selection();
 
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($core);
     $usr_id = $appbox->get_session()->get_usr_id();
 
     if (trim($Request->get('ssel')) !== '')
diff --git a/lib/Alchemy/Phrasea/Helper/Record/MoveCollection.php b/lib/Alchemy/Phrasea/Helper/Record/MoveCollection.php
index 07fc44ffab..af558854f2 100644
--- a/lib/Alchemy/Phrasea/Helper/Record/MoveCollection.php
+++ b/lib/Alchemy/Phrasea/Helper/Record/MoveCollection.php
@@ -98,7 +98,7 @@ class MoveCollection extends RecordHelper
    */
   public function execute(Request $request)
   {
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
     $user = $this->getCore()->getAuthenticatedUser();
 
     $baseId = $request->get('base_id');
diff --git a/lib/Alchemy/Phrasea/Helper/User/Edit.php b/lib/Alchemy/Phrasea/Helper/User/Edit.php
index a42ab38fee..035d9afce4 100644
--- a/lib/Alchemy/Phrasea/Helper/User/Edit.php
+++ b/lib/Alchemy/Phrasea/Helper/User/Edit.php
@@ -63,7 +63,7 @@ class Edit extends \Alchemy\Phrasea\Helper\Helper
 
   public function delete_users()
   {
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
     foreach ($this->users as $usr_id)
     {
       $user = \User_Adapter::getInstance($usr_id, $appbox);
@@ -92,7 +92,7 @@ class Edit extends \Alchemy\Phrasea\Helper\Helper
   public function get_users_rights()
   {
     $user = $this->getCore()->getAuthenticatedUser();
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
 
     $list = array_keys($user->ACL()->get_granted_base(array('canadmin')));
 
@@ -393,7 +393,7 @@ class Edit extends \Alchemy\Phrasea\Helper\Helper
 
   public function apply_rights()
   {
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
     $session = $appbox->get_session();
     $request = \http_request::getInstance();
     $ACL = \User_Adapter::getInstance($session->get_usr_id(), $appbox)->ACL();
@@ -543,14 +543,14 @@ class Edit extends \Alchemy\Phrasea\Helper\Helper
 
     $users = $this->users;
 
-    $user = \User_adapter::getInstance(array_pop($users), \appbox::get_instance());
+    $user = \User_adapter::getInstance(array_pop($users), \appbox::get_instance($this->core));
 
     if ($user->is_template() || $user->is_special())
     {
       return $this;
     }
 
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
     $session = $appbox->get_session();
     $request = \http_request::getInstance();
 
@@ -592,7 +592,7 @@ class Edit extends \Alchemy\Phrasea\Helper\Helper
 
   public function apply_template()
   {
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
     $session = $appbox->get_session();
 
     $template = \User_adapter::getInstance($this->request->get('template'), $appbox);
@@ -627,7 +627,7 @@ class Edit extends \Alchemy\Phrasea\Helper\Helper
 
     foreach ($this->users as $usr_id)
     {
-      $user = \User_Adapter::getInstance($usr_id, \appbox::get_instance());
+      $user = \User_Adapter::getInstance($usr_id, \appbox::get_instance($this->core));
       if ($this->request->get('quota'))
         $user->ACL()->set_quotas_on_base($this->base_id, $this->request->get('droits'), $this->request->get('restes'));
       else
@@ -650,7 +650,7 @@ class Edit extends \Alchemy\Phrasea\Helper\Helper
     {
       foreach ($this->users as $usr_id)
       {
-        $user = \User_Adapter::getInstance($usr_id, \appbox::get_instance());
+        $user = \User_Adapter::getInstance($usr_id, \appbox::get_instance($this->core));
 
         $user->ACL()->set_masks_on_base($this->base_id, $vand_and, $vand_or, $vxor_and, $vxor_or);
       }
@@ -670,7 +670,7 @@ class Edit extends \Alchemy\Phrasea\Helper\Helper
 
     foreach ($this->users as $usr_id)
     {
-      $user = \User_Adapter::getInstance($usr_id, \appbox::get_instance());
+      $user = \User_Adapter::getInstance($usr_id, \appbox::get_instance($this->core));
 
       $user->ACL()->set_limits($this->base_id, $activate, $dmin, $dmax);
     }
diff --git a/lib/Alchemy/Phrasea/Helper/User/Manage.php b/lib/Alchemy/Phrasea/Helper/User/Manage.php
index 6a36961d72..35479a42d4 100644
--- a/lib/Alchemy/Phrasea/Helper/User/Manage.php
+++ b/lib/Alchemy/Phrasea/Helper/User/Manage.php
@@ -42,7 +42,7 @@ class Manage extends \Alchemy\Phrasea\Helper\Helper
   public function export()
   {
     $request = $this->request;
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
     $session = $appbox->get_session();
 
     $offset_start = (int) $request->get('offset_start');
@@ -80,7 +80,7 @@ class Manage extends \Alchemy\Phrasea\Helper\Helper
   public function search()
   {
     $request = $this->request;
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
 
     $offset_start = (int) $this->request->get('offset_start');
     $offset_start = $offset_start < 0 ? 0 : $offset_start;
@@ -165,7 +165,7 @@ class Manage extends \Alchemy\Phrasea\Helper\Helper
       throw new \Exception_InvalidArgument(_('Invalid mail address'));
     }
 
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
 
     $conn = $appbox->get_connection();
     $sql = 'SELECT usr_id FROM usr WHERE usr_mail = :email';
@@ -197,7 +197,7 @@ class Manage extends \Alchemy\Phrasea\Helper\Helper
       throw new \Exception_InvalidArgument(_('Invalid template name'));
     }
 
-    $appbox = \appbox::get_instance();
+    $appbox = \appbox::get_instance($this->core);
     $user = $this->getCore()->getAuthenticatedUser();
 
     $created_user = \User_Adapter::create($appbox, $name, \random::generatePassword(16), null, false, false);