Try a different key. I had this same issue, towed it to my indie and he asked if I had my second key. I had my GF bring me the key and it fired right up. Not sure what caused the key to go bad but it still will not work to this day. To be clear... the key will remote lock / unlock so I know it is charged... just won't start the car anymore. Something about communicating with the EWS?

Good Luck!