cake php id not beig retrieved in function from url

[devilinc]

i have a form that validates...if validation takes place correctly i just lose my 'id'...this "id" is needed to be passed to my url to save the form values to this particular category of 'id'....if data is correct and no validation required and i submit form i get the id passed to and stores correctly......what do i do?

[devilinc]

here is my code for better understanding only the save or not save part

if ($this->Customer->save($this->data)) 
		   {
				// $this->redirect(array('controller' => 'realteams', 'action' => 'index'));			

				//$data = $this->paginate('Customer');
				 $this->redirect(array('action' => '/customerslist/'.$_SESSION['department_id']));
				  unset($_SESSION['department_id']);
				  ob_flush();
		   }
		   else 
		   {
			  $this->Session->setFlash(__('The Customer could not be saved. Please, try again.', true));
			  //$this->redirect(array('action' => '/customerscreate/'.$_SESSION['department_id']));
			   }