dead battery possibly. just a guess, you didn't give much detail.
The ignition tumbler will not turn and you will not be able to start the car.
get in the car and turn the key. if your unable to start it then something else went wrong.
wrong key when using the remote starter the starter does't crank long enough to start the car. Starting the car with the key the car starts five. Could use some help.
wrong key... or yo have jarred the sensor ibn the trunk of your car under the upholstry
Most likely your car battery is completley dead.
solenoid or relay switch
If the Car didn't start with the key turning the ignition then the car was "hotwired" to turn the Car on.If the key did not start the car, how was it started.
coded key, wrong chip code, or key that hasn't been coded. Call a dealer, he will set it up
The security system has activated. Wait 30 minutes and try it again with the right key.
The built in security system thinks someone is trying to steal the car. Remove key, walk away and try again in about 30 minutes with the right key, it should reset itself.
If the theft system light is flashing...try to start car,when it starts and then dies,leave the key on for about 10 mins. until it stops flashing.Turn key off,Now start the car as usual.
only thing i can think of is because the key has a computer chip in it if u have the wrong key or the chip is messed up the car wont start