$_FILES Array getting empty when using $this->form_validation->run()

Instead of trying this one

PHP Code:

if($this->form_validation->run() == FALSE)
           {
               $this->listProperty();
           }
           else
           { 


can you please try : 

PHP Code:

if($this->form_validation->run())
           {
               //the working result comes here
           }
           else {
 $this->listProperty();}