ClientMessage() doesn't work, gives no output

Hello guys.
I’ve got a BeginPlay() function in my PlayerController.
This PlayerController gets used for playing in editor.
PlayerController:

void APongPlayerController::BeginPlay()
{
	Super::BeginPlay();
	FString test = "Test";
	ClientMessage(test);

	ClientMessage("Test");
	GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Yellow, TEXT("In PlayerController"));
}

When I’m playing in the editor and checking the output log, I’m not getting any message though.
What am I doing wrong?
Here’s a Screenshot of the output log. Nothing special here I guess.
( http://imgur.com/hdzvCrt )

Aaand here’s a screenshot of the console. ( http://imgur.com/W4BT3Wk )

Thanks for your time and help!

See: “Outputs a message to HUD”

Trying creating a HUD and see if that works

Oh, sorry. Gotta read more thoroughly.