unlock the car with key in drivers door, then press the unlock button on fob a number of times to re sync the immobilizer to the key, also check the fob is working (maybe flat battery?) - hold the fob up close to a cheap AM radio and you should hear the radio make buzzing noises when you press the lock/unlock buttons in - you may have to re tune the radio to a point that no radio stations can be found though. this test is only an indicator the fob is doing something!
ian, August 2010