Trying to use precipitation and lightning (makes me crash)

// Load up all datablocks, objects etc.  This function is called when
	// a server is constructed.
	exec("base/datablocks.cs");

datablock AudioProfile(HeavyRainSound)
{
	filename	 = "base/audio/rain.ogg";
	description = AudioLooping2d;
};

datablock AudioProfile(ThunderCrash1Sound)
{
	filename  = "base/audio/thunder1.ogg";
	description = Audio2d;
};

datablock AudioProfile(ThunderCrash2Sound)
{
	filename  = "base/audio/thunder2.ogg";
	description = Audio2d;
};

datablock AudioProfile(ThunderCrash3Sound)
{
	filename  = "base/audio/thunder3.ogg";
	description = Audio2d;
};

datablock AudioProfile(ThunderCrash4Sound)
{
	filename  = "base/audio/thunder4.ogg";
	description = Audio2d;
};

datablock LightningData(LightningStorm)
{
	strikeTextures[0]  = "base/environment/lightning.dml";

	//strikeSound = LightningHitSound;
	thunderSounds[0] = ThunderCrash1Sound;
	thunderSounds[1] = ThunderCrash2Sound;
	thunderSounds[2] = ThunderCrash3Sound;
	thunderSounds[3] = ThunderCrash4Sound;
};

datablock PrecipitationData(HeavyRain)
{ 
	type = 1; 
	materialList = "base/environment/rain.dml";
	soundProfile = "HeavyRainSound";					  
	sizeX = 0.1; 
	sizeY = 0.1; 

	movingBoxPer = 0.35; 
	divHeightVal = 1.5; 
	sizeBigBox = 1; 
	topBoxSpeed = 20; 
	frontBoxSpeed = 30; 
	topBoxDrawPer = 0.5; 
	bottomDrawHeight = 40; 
	skipIfPer = -0.3; 
	bottomSpeedPer = 1.0; 
	frontSpeedPer = 1.5; 
	frontRadiusPer = 0.5; 
};

new Precipitation()
	{
		position = "0 0 0";
		rotation = "1 0 0 0";
		scale = "1 1 1";
		datablock = "HeavyRain";
		percentage = "1";
		color1 = "0.700000 0.700000 0.700000 1"; 
		color2 = "-1.000000 0.000000 0.000000 1.000000"; 
		color3 = "-1.000000 0.000000 0.000000 1.000000";
		offsetSpeed = "0"; 
		minVelocity = "2"; 
		maxVelocity = "3"; 
		maxNumDrops = "3000"; 
		maxRadius = "10"; 
		locked = "true"; 
	};

	new Lightning()
	{
		position = "200 100 300";
		rotation = "1 0 0 0";
		scale = "250 400 500";
		datablock = "LightningStorm";
		strikesPerMinute = "20";
		strikeWidth = "2.5";
		chanceToHitTarget = "100";
		strikeRadius = "50";
		boltStartRadius = "20";
		color = "1.000000 1.000000 1.000000 1.000000";
		fadeColor = "0.100000 0.100000 1.000000 1.000000";
		useFog = "1";
		locked = "true";
	};

//in bitmapExtrudeRGBA_c()

// 1st line of the for
*dst++ = (U32(*src) + U32(src[4]) + U32(src[stride]) + U32(src[stride+4]) + 2) >> 2;