Movement does not replicate?

Hello, i have the following problem: I am using bp to apply a Speedvalue to an Actor, even though replicate movement is ticked the actor only moves for the server. After several seconds the actor collides with a wall and the server prints the message, but the client cant see any of this, the actor doesnt move at all. Is there any way to make sure that the server applies the force and the clients can see the result? I want to make sure that only the server got control over the speed and positions.