Wallhack is not working, I really tried all!

DWORD clientDLL;

Vector2D D::WorldToScreen( const Vector from ) {

	while(!clientDLL)
	clientDLL = (DWORD)GetModuleHandle("client.dll");

	const VMatrix worldToScreen = *(VMatrix*)((DWORD)clientDLL + 0x4A6B964);

	float w = 0.0f;
	Vector2D to;

	to.x = worldToScreen[0][0] * from.x + worldToScreen[0][1] * from.y + worldToScreen[0][2] * from.z + worldToScreen[0][3];
	to.y = worldToScreen[1][0] * from.x + worldToScreen[1][1] * from.y + worldToScreen[1][2] * from.z + worldToScreen[1][3];
	w = worldToScreen[3][0] * from.x + worldToScreen[3][1] * from.y + worldToScreen[3][2] * from.z + worldToScreen[3][3];

	if (w < 0.01f) {
		Vector2D empty;
		return empty;
	}

	float invw = 1.0f / w;
	to.x *= invw;
	to.y *= invw;

	int width, height;
	I::Engine->GetScreenSize( width, height );

	float x = width / 2.0f;
	float y = height / 2.0f;

	x += 0.5f * to.x * width + 0.5f;
	y -= 0.5f * to.y * height + 0.5f;

	to.x = x;
	to.y = y;

	return to;
}

Vector max = Entity->GetCollideable()->OBBMaxs();
	Vector pos3D;
	Vector top3D;
	pos3D = Entity->GetOrigin();
	top3D = pos3D + Vector( 0, 0, max.z );

	Vector2D pos = D::WorldToScreen(pos3D);
	Vector2D top = D::WorldToScreen(top3D);

	float height = ( top.y - pos.y );

if( Entity->IsVisible( 8 ) && Vars.Visuals.Box )
		PlayerBox2( pos.x - (height / 4.0f), pos.y, height / 2.0f, height, Entity->IsEnemy() ? Color( 200, 60, 60 ) : Color( 84, 167, 255 ) );
	else if( !Entity->IsVisible( 8 ) && Vars.Visuals.Box )
		PlayerBox2(pos.x - (height / 4.0f), pos.y, height / 2.0f, height, Entity->IsEnemy() ? Color(232, 209, 32) : Color(72, 219, 75));