diff --git a/authzgroups.php b/authzgroups.php
index f145c8b..5732223 100644
--- a/authzgroups.php
+++ b/authzgroups.php
@@ -54,7 +54,7 @@ class authzgroups
     if ($this->debug) echo "$req\n";
     try
     {
-      $st = $this->dbObject->db->prepare ($req);
+      $st = $this->dbObject->prepare ($req);
     }
     catch (Exception $e)
     {
diff --git a/dblayer.php b/dblayer.php
index 081f85d..20691fa 100644
--- a/dblayer.php
+++ b/dblayer.php
@@ -101,23 +101,27 @@ class dblayer extends PDO
     if (! isset ($driver[0]))
       throw new Exception (_("No valid DSN provided"), 500);
     // Force specifics initialisations
-    $oldInst = self::getInstance($dsn, $username);
+/*    $oldInst = self::getInstance($dsn, $username);
 
     if ($oldInst !== null)
     {
-      $this->db = $oldInst["db"];
+      $this = $oldInst["db"];
+$this->setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+$this->exec("PRAGMA foreign_keys = ON");
       $this->sep = $oldInst["sep"];
       $this->dsn = $oldInst["dsn"];
+echo "OLD\n";
       return;
     }
 
+echo "NEW\n";*/
     switch ($driver[0])
     {
     case "sqlite":
       try
       {
-        $this->db = new PDO ($dsn, $username, $password, $driver_options);
-        $this->db->setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+        parent::__construct ($dsn, $username, $password, $driver_options);
+        parent::setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
       }
       catch (Exception $e)
       {
@@ -138,15 +142,15 @@ class dblayer extends PDO
           fileowner ($file) === posix_getuid ())
         chmod ($file, 0666);
       // Force ForeignKeys support (disabled by default)
-      $this->db->exec("PRAGMA foreign_keys = ON");
+      $this->exec("PRAGMA foreign_keys = ON");
       $this->sep = "`";
       break;
     case "mysql":
       try
       {
         $driver_options[PDO::MYSQL_ATTR_FOUND_ROWS] = 1;
-        $this->db = new PDO ($dsn, $username, $password, $driver_options);
-        $this->db->setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+        parent::__construct ($dsn, $username, $password, $driver_options);
+        parent::setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
       }
       catch (Exception $e)
       {
@@ -154,14 +158,14 @@ class dblayer extends PDO
       }
 
       // Set the coding to UTF8
-      $this->db->exec("SET CHARACTER SET utf8");
+      $this->exec("SET CHARACTER SET utf8");
       $this->sep = "`";
       break;
     case "pgsql":
       try
       {
-        $this->db = new PDO ($dsn, $username, $password, $driver_options);
-        $this->db->setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+        parent::__construct ($dsn, $username, $password, $driver_options);
+        parent::setAttribute (PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
       }
       catch (Exception $e)
       {
@@ -169,12 +173,12 @@ class dblayer extends PDO
       }
 
       // Set the coding to UTF8
-      $this->db->exec("SET NAMES 'utf8'");
+      $this->exec("SET NAMES 'utf8'");
       $this->sep = "\"";
       break;
     }
     $this->dsn = $dsn;
-    self::$instance["$dsn-$username"]["db"] = $this->db;
+    self::$instance["$dsn-$username"]["db"] = $this;
     self::$instance["$dsn-$username"]["dsn"] = $this->dsn;
     self::$instance["$dsn-$username"]["sep"] = $this->sep;
   }
@@ -193,7 +197,7 @@ class dblayer extends PDO
   /** Return the connected database name from DSN used to connect */
   public function databasename ()
   {
-    if ($this->db === null)
+    if ($this === null)
       throw new Exception (dgettext("domframework", "Database not connected"),
                            500);
     $vals = explode (";", substr (strstr ($this->dsn, ":"), 1));
@@ -211,14 +215,14 @@ class dblayer extends PDO
   /** Return all the tables available in the database */
   public function listTables ()
   {
-    if ($this->db === null)
+    if ($this === null)
       throw new Exception (dgettext("domframework", "Database not connected"),
                            500);
-    switch ($this->db->getAttribute(PDO::ATTR_DRIVER_NAME))
+    switch ($this->getAttribute(PDO::ATTR_DRIVER_NAME))
     {
     case "sqlite":
       $req = "SELECT name FROM sqlite_master WHERE type='table'";
-      $st = $this->db->prepare ($req);
+      $st = $this->prepare ($req);
       $st->execute ();
       $res = array ();
       while ($d = $st->fetch (PDO::FETCH_ASSOC))
@@ -228,7 +232,7 @@ class dblayer extends PDO
       $req = "SELECT TABLE_NAME
               FROM information_schema.tables
               WHERE TABLE_SCHEMA='".$this->databasename()."'";
-      $st = $this->db->prepare ($req);
+      $st = $this->prepare ($req);
       $st->execute ();
       $res = array ();
       while ($d = $st->fetch (PDO::FETCH_ASSOC))
@@ -238,7 +242,7 @@ class dblayer extends PDO
       $req = "SELECT *
               FROM pg_tables
               WHERE schemaname = 'public'";
-      $st = $this->db->prepare ($req);
+      $st = $this->prepare ($req);
       $st->execute ();
       $res = array ();
       while ($d = $st->fetch (PDO::FETCH_ASSOC))
@@ -492,7 +496,7 @@ class dblayer extends PDO
              "FROM $this->sep$this->tableprefix$table$this->sep ".
              "WHERE $this->sep$column$this->sep=:".md5 ($column);
       if ($this->debug) echo "DEBUG : $req\n";
-      $st = $this->db->prepare ($req);
+      $st = $this->prepare ($req);
       $val = $datas[$foreign];
       $key = $column;
       if ($this->debug) echo "DEBUG BIND : ".$this->fields[$foreign][0]."\n";
@@ -541,7 +545,7 @@ class dblayer extends PDO
   public function insert ($datas)
   {
     if ($this->debug) echo "== Entering insert\n";
-    if ($this->db === null)
+    if ($this === null)
       throw new Exception (dgettext("domframework", "Database not connected"),
                            500);
     if ($this->unique === null)
@@ -584,7 +588,7 @@ class dblayer extends PDO
     $req .= " VALUES ";
     $req .= "(:".implode (",:", $binds).")";
     if ($this->debug) echo "DEBUG : $req\n";
-    $st = $this->db->prepare ($req);
+    $st = $this->prepare ($req);
     foreach ($datasOK as $key=>$val)
     {
       if ($this->debug) echo "DEBUG BIND : $key(".md5 ($key).")->".
@@ -612,7 +616,7 @@ class dblayer extends PDO
       echo "dblayer execute exception : ".$e->getMessage()."\n";
       exit;
     }
-    return $this->db->lastInsertId();
+    return $this->lastInsertId();
   }
 
   /** Read the table content based on a select filter, ordered by order
@@ -631,7 +635,7 @@ class dblayer extends PDO
                         $whereOr=false)
   {
     if ($this->debug) echo "== Entering read\n";
-    if ($this->db === null)
+    if ($this === null)
       throw new Exception (dgettext("domframework", "Database not connected"),
                            500);
     if ($select !== null && !is_array ($select))
@@ -708,7 +712,7 @@ class dblayer extends PDO
     if ($this->debug) echo "DEBUG : $req\n";
     try
     {
-      $st = $this->db->prepare ($req);
+      $st = $this->prepare ($req);
     }
     catch (Exception $e)
     {
@@ -747,7 +751,7 @@ class dblayer extends PDO
   public function update ($updatekey, $datas)
   {
     if ($this->debug) echo "== Entering update\n";
-    if ($this->db === null)
+    if ($this === null)
       throw new Exception (dgettext("domframework", "Database not connected"),
                            500);
     if (count ($this->fields) === 0)
@@ -780,7 +784,7 @@ class dblayer extends PDO
     $req .= " WHERE $this->sep$this->primary$this->sep=:".
               md5 ("PRIMARY".$this->primary);
     if ($this->debug) echo "DEBUG : $req\n";
-    $st = $this->db->prepare ($req);
+    $st = $this->prepare ($req);
     // Add the primary key to field list temporaly. It will permit to update the
     // primary key
     $fields = $this->fields;
@@ -832,11 +836,11 @@ class dblayer extends PDO
   public function delete ($deletekey)
   {
     if ($this->debug) echo "== Entering delete\n";
-    if ($this->db === null)
+    if ($this === null)
       throw new Exception (dgettext("domframework", "Database not connected"));
     $req = "DELETE FROM $this->sep$this->tableprefix$this->table$this->sep ";
     $req .= "WHERE $this->primary = :primary";
-    $st = $this->db->prepare ($req);
+    $st = $this->prepare ($req);
     if ($this->debug) echo "DEBUG : $req\n";
     if ($this->debug) echo "DEBUG BIND : primary->".
                            var_export ($deletekey, TRUE)."\n";
@@ -869,12 +873,12 @@ class dblayer extends PDO
   public function dropTable ()
   {
     if ($this->debug) echo "== Entering dropTables\n";
-    if ($this->db === null)
+    if ($this === null)
       throw new Exception (dgettext("domframework", "Database not connected"));
     $sql = "DROP TABLE $this->sep$this->tableprefix$this->table$this->sep";
     if ($this->debug)
       echo "$sql\n";
-    return $this->db->exec($sql);
+    return $this->exec($sql);
   }
 
   /** Create the table defined by the differents fields.
@@ -896,12 +900,12 @@ class dblayer extends PDO
   public function createTable ()
   {
     if ($this->debug) echo "== Entering createTable\n";
-    if ($this->db === null)
+    if ($this === null)
       throw new Exception (dgettext("domframework", "Database not connected"),
                            500);
     if (count ($this->fields) === 0)
       throw new Exception (dgettext("domframework", "No Field defined"), 500);
-    switch ($this->db->getAttribute(PDO::ATTR_DRIVER_NAME))
+    switch ($this->getAttribute(PDO::ATTR_DRIVER_NAME))
     {
     case "sqlite":
       $sql = "CREATE TABLE $this->sep$this->tableprefix$this->table$this->sep ".
@@ -1191,9 +1195,14 @@ class dblayer extends PDO
                            "PDO Engine not supported in dbLayer"), 500);
     }
 
+$this->debug = true;
     if ($this->debug)
       echo "$sql\n";
-    return $this->db->exec($sql);
+$rc=$this->exec($sql);
+var_dump ($rc);
+//print_r($this->errorInfo());
+return $rc;
+    return $this->exec($sql);
   }
 
   /** This function permit to send a SQL request to the database to do a SELECT
@@ -1201,7 +1210,7 @@ class dblayer extends PDO
   public function directRead ($sql)
   {
     if ($this->debug) echo "== Entering directRead\n";
-    $st = $this->db->prepare ($sql);
+    $st = $this->prepare ($sql);
     $st->execute ();
     $res = array ();
     while ($d = $st->fetch (PDO::FETCH_ASSOC))