Just wanted to sanity check something... Does the button on the CHAdeMO adapter only unlock the charge port? I've only used mine a few times, but the button will never open the charge port on my car. I've tried with it both plugged into the CHAdeMO station, and also just on its own, but neither scenario seems to allow it to open up the charge port. Is this the intended behavior? I did notice that in the adapter manual, it doesn't mention using the button as one of the methods for opening the charge port.