Originally Posted by ErbslinTrouble

well said Helz

you can also use positive rewards. get some of your cats favorite treats and go on the opposite side of the flap to the cat put your hand through the flap with the treat with the flap up. then pull the flap towards you and hold the treat at the 'nosing' or mid base of the doorway under the half open flap. let the cat have the treat. if your cat is happy to have some more treats and you have not experienced any apprehension so far continue bringing the treat closer to you and getting the cat to come through the door and feel the door on it's back. eventually you will have the cat coming through the door for the treat. once you have got the cat coming through the door. wait till dinner time for kitty and put kitty outside in front of the door. place the bowl of food on the floor just inside the house and watch... you should have cat through door fairly quickly especially if you have a regular dinner time for your cat daily so the cat will be expecting dinner!