PUMPKIN CAR STEREO SUPPORT CENTER

We have tryed the method in the post and that doesn't work it kind of worked once but no dose not, the unit has no memory and only switches on with the ignition and you have to push the power button to switch it on, the car it is going in to is a 2006 Subaru Impreza.

We have tryed the method explained in the linked post,but still nothing seems to be working, the car is a 2006 Jdm Subaru Impreza.and the unit only seems to power in when you press the power button it doesn't come on when ou turn the ignition on

Have a KD co224
wired into vehicle but cannot keep power when ignition is switched off so lose all settings
unit will only power on when ignition is on

Any help please