206 1.4 Xr automatic transmission problem

Hello

I set off to go to work in the morning with the car. After 200 - 300 m, I went to SK mode with a hard hitting sound. Since it happened to me, I pulled over the car and switched it off again. the clock is rising but there is no click on the vehicle 1 2 3 modes & nbsp; I tried again, there is no movement. I bought R, the car is going today. I seem to go to the gearbox tomorrow. & nbsp; I am waiting for your help if there is any idea that can happen to you before.