Thread: Help with cat flap traing

We have two 8 month old kittens Max and Lizzie , A few hours after installing the cat flap and showing them how to use it Lizzie was using it without any problems in fact it was like a new toy to her Max on the other hand has not got a clue . If we open the flap up for him he is out like a shot ,we have played with his toys passing them in and out he just stares in complete bemusement Lizzie fed up with being outside by herself has tried showing him which was a fascinating sight her pushing the flap open slightly with her paw waiting for him to do the rest , even she has given up :( With spring just around the corner Lizzie will be spending all her time outside enjoying the fresh air whilst Max paces the window watching her . Has anybody any hints ?