I own a 2000 C-5 convertible with 10k miles. I have not driven the car in about 6 weeks and when I attempted to start the car recently, the battery was dead. I had the battery replaced in March at the dealership. I charged the battery and ran the codes and reset until I received the "No Codes" message. However, I am getting a message "Pull Key and wait 10 Seconds" followed by "Service Column Lock". I took the car to the dealership in March for the steering column lock recall. The car starts, but, the engine dies when I attempt to drive it. Can you offer any suggestions for troubleshooting this problem prior to taking the car to the dealership?