just got a new spare key off ebay, had it cut and tried programing it according to the manual,i have two original keys, the doors open fine but the car won't start. tried programing it several times still won't start. if i hold the transponder of my origianl key next to the new one it starts. i have emailed the seller to see what he says but is there anything i might be doing wrong, i don't think there is. short of swapping the transponder i'm stuck.