diff --git a/workflow/engine/methods/cases/cases_Open.php b/workflow/engine/methods/cases/cases_Open.php
index 422393aaa..477fb90eb 100755
--- a/workflow/engine/methods/cases/cases_Open.php
+++ b/workflow/engine/methods/cases/cases_Open.php
@@ -111,13 +111,13 @@ try {
                 //verify if the case is with the current user
                 $c = new Criteria( 'workflow' );
                 $c->add( AppDelegationPeer::APP_UID, $sAppUid );
-                $c->addAscendingOrderByColumn( AppDelegationPeer::DEL_INDEX );
+                $c->add( AppDelegationPeer::DEL_THREAD_STATUS, 'OPEN' );
+                $c->add( AppDelegationPeer::DEL_INDEX, $iDelIndex );
                 $oDataset = AppDelegationPeer::doSelectRs( $c );
                 $oDataset->setFetchmode( ResultSet::FETCHMODE_ASSOC );
                 $oDataset->next();
                 $aData = $oDataset->getRow();
-
-                if ($aData['USR_UID'] != $_SESSION['USER_LOGGED'] && $aData['USR_UID'] != "") {
+                if ($aData['USR_UID'] !== $_SESSION['USER_LOGGED'] && $aData['USR_UID'] !== '') {
                     //distinct "" for selfservice
                     //so we show just the resume
                     $_SESSION['alreadyDerivated'] = true;
@@ -131,6 +131,7 @@ try {
                     require_once (PATH_METHODS . 'cases' . PATH_SEP . 'cases_Resume.php');
                     exit();
                 }
+
             }
 
             //proceed and try to open the case