How to properly use movement components in unreal engine 4? - unreal-engine4

Question

I'm trying to set up a very simple RTS-like camera that moves around at the pressure of wasd or the arrow keys. But I can't manage to make it work.
I have a player controller that handles input like so:
void AMyPlayerController::SetupInputComponent()
{
Super::SetupInputComponent();
InputComponent->BindAxis("CameraForward", this, &AMyPlayerController::CameraForward);
}
void AMyPlayerController::CameraForward(float Amount)
{
MyRtsCameraReference->CameraForward(Amount);
}
In my camera actor, which inherits from APawn, and I initialize like this:
ARtsCamera::ARtsCamera()
{
PrimaryActorTick.bCanEverTick = true;
CameraComponent = CreateDefaultSubobject<UCameraComponent>(TEXT("CameraComponent"));
SpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("SpringArm"));
// I tried to use a static mesh in place of this but nothing changes.
SceneRoot = CreateDefaultSubobject<USceneComponent>(TEXT("SceneRoot"));
MovementComponent = CreateDefaultSubobject<UFloatingPawnMovement>(TEXT("MovementComponent"));
SpringArm->TargetArmLength = 500.f;
SetRootComponent(SceneRoot);
SpringArm->SetupAttachment(SceneRoot);
CameraComponent->SetupAttachment(SpringArm);
SpringArm->AddLocalRotation(FRotator(0.f, -50.f, 0.f));
}
I try to handle the movement like this:
void ARtsCamera::CameraForward(float Amount)
{
if (Amount != 0)
{
// Here speed is a float used to control the actual speed of this movement.
// If Amount is printed here, I get the correct value of 1/-1 at the pressure of w/s.
MovementComponent->AddInputVector(GetActorForwardVector() * Amount * Speed);
}
}
In my set up i then create a blueprint which inherits from this to expose to the level design phase a few parameters like Speed or the spring arm length and so on, but this shouldn't be the issue as if I use the C++ class the behaviour is the same.
The following works as expected (except for the fact that when i then rotate the camera, vectors get messed up) but i would like to use a movement component.
void ARtsCamera::CameraForward(float Amount)
{
if (Amount != 0)
{
AddActorWorldOffset(GetActorForwardVector() * Amount * CameraMovingSpeed);
}
}
The mobility is set to movable. And so far everything seems to be simple enough, no compile errors, but the actor doesn't move. What am I missing?
Also would you use the FloatingPawnMovement for this or would you go for another movement component?
Thanks in advance.