Proud new owner of #311, a "thunder grey" 2008 Roadster. Got home and when I plug in my 240 volt wall charger (for my other electric car), it doesn't work. I'm using the short 1772 adapter that came with the car (I know it's not a Tesla adapter). Made sure the mode was standard and that I wanted it charged when plugged in...not on timer. Also tried my 120 volt charger and it also didn't work. Am I doing something wrong? Any ideas? Thanks!