Hello, i try it in english,

I have installed a new weber 32/34 dmtl for the golf1 1.8 GU, when I have driven and the car has been standing still for about 1 hour in the garage, the carburetor starts to leak and smell of petrol. They have already checked the carburetor for the float needle, this should be good, the car drives fine but only when the engine is off does it leak petrol after a while. I have replaced the swirl pot allready, Anyone have an idea?