I recently purchased my 2006 Saab 9-5 2.3t From a dealership in Ohio. I have been driving it fine for a while, then one day about a week after changing the Key Battery (key+fob single unit) the error "Key Not Accepted, Contact Service" Error message pops up 95% of the time on the SID. I can reset the battery with rarely works. Please help. I repeatedly turn this car off and on for work delivering pizzas and phone books. PLEASE HELP!