I have a 2001 2.7 A6 with 70k miles. This morning when I went to start the car it would for a moment strat and then the fuel would shut off. Then the "Vehicle Immobilizer" indicator would begin to flash. I checked the owners manual with no help. I tried my spare key and it did the same thing. Any thoughts? I did a search with no results, so has anyone experienced this? Please help!