public function testConnectionAction()
 {
     try {
         AW_Advancednewsletter_Model_Sync_Mailchimpclient::testConnection($this->getRequest()->getParams());
     } catch (Exception $e) {
         return $this->getResponse()->setBody($this->_helper()->__($e->getMessage()));
     }
     return $this->getResponse()->setBody($this->_helper()->__('Connection successfull'));
 }