SAMP 0.3.7 Server SetNameTagDrawDistance

[MiauMiauMiau]

I created a test server to get the address of [font=Source Sans Pro,Tahoma,Helvetica Neue,Arial,sans-serif]SetNameTagDrawDistance.
But if i put it in my script[/font] with pawno the NameTagDrawDistance doesnt change at all.

public OnGameModeInit()
{
	SetNameTagDrawDistance(6.0);

	return 1;
}

I dont know what im doint wrong
I hope some1 can help me