This happened to me once before. I also tried jumping it; however, that worked for me, in spite of it not being a low battery. As I understand it, it has something to do wtih the alarm system. I was told that I needed to rub the key or jeep symbol that came with the keys, on the padded area of the dash, just below the ignition. You'll surely want to clarify all of this elsewhere, but this was my experience...