Can you help?

Mine does that all the time. It is a security lock out function. Only a key with transponder in it will start the car. If you know you have the right key then there is another thing to check. On the right side of the steering column there is a squarish rubber plug thingy. Pry that out and wiggle the electronic chip you should see in there. It does not always keep a good contact. And when that happens the security feature prevents the car from starting.