Paseo Keyless Entry Problems

[glanza s ep91]

Hi, I have a 1997 toyota paseo. The car never came with a key fob when I bought it. I've recently bought a paseo with a 5efhe engine in and it came with a keyfob which worked both lock and unlock on the car. Since I'm scrapping the 2nd one I bought after removing the engine ive coded the keyfob to my other paseo and it unlocks the car but doesn't lock it. I've tried a few times to reprogram it but still have the same problem. I've even tried putting the alarm ecu from under the dash from one car to the other and I still have the same problem. The led on the keyfob lights up when either button is pressed. Any help would be great as I really don't know where to go from here. Thanks