I have "registered" my cat with Cat Mate Elite. Everything worked perfectly. The "get out" function works logically, as there is no big check. So I can push the flap outwards. How do I check whether the "in" function works? I can't manually push the flap inwards, the "locked" symbol appears immediately. Do I have to "push" the cat into the tunnel "from the outside"? She won't do it voluntarily, of course.