i'm afraid qatar living isn't the place for your problem; it could be something as simple as low transmission fluid to more serious issues like bad shift solenoids to very expensive issues like mechanical failure. If you've bought the car used, it's possible the previous owner has abused the transmission. Automatic transmissions are built to last a long time so I'm thinking it might be something minor like low fluid, a leak, clogged filter or bad electro-mechanical communication. Whatever it is, do not delay the repair or you're looking at further and much more expensive damage. best of luck and please update us with what happened; it can be of help later to other ql users later so don't just forget about the thread once your car is repaired:-)