monogame problem

draw.cs

public static void Draw(GameTime gameTime)
{
            var effect = DDGame.contentManager.Load<Effect>("road");
            effect.Parameters["TerrainTexture"].SetValue(MainState.level.tex);
            effect.Parameters["MaskTexture"].SetValue(MainState.maskTex);

            DDGame.batch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, null, null, null, effect);             
            DDGame.batch.Draw(MainState.roadTex, new Rectangle(0, 0, Settings.WINDOW_WIDTH, Settings.WINDOW_HEIGHT), Color.White);            
            DDGame.batch.End();
 }
 
 //*** and the shader for road //
 
 #if OPENGL
	#define SV_POSITION POSITION
	#define VS_SHADERMODEL vs_3_0
	#define PS_SHADERMODEL ps_3_0
#else
	#define VS_SHADERMODEL vs_4_0_level_9_1
	#define PS_SHADERMODEL ps_4_0_level_9_1
#endif

Texture2D RoadTexture;
sampler2D RoadTextureSampler = sampler_state
{
	Texture = <RoadTexture>;	
};

Texture2D TerrainTexture;
sampler2D TerrainTextureSampler = sampler_state
{
	Texture = <TerrainTexture>;
};


Texture2D MaskTexture;
sampler2D MaskTextureSampler = sampler_state
{
	Texture = <MaskTexture>;
};

struct VertexShaderOutput
{
	float4 Position : SV_POSITION;
	float4 Color : COLOR0;
	float2 TextureCoordinates : TEXCOORD0;
};

float4 MainPS(VertexShaderOutput input) : COLOR
{
	
	float4 maskColor = tex2D(MaskTextureSampler,input.TextureCoordinates);		
	
	if (maskColor.r == 1.0) {		
		return tex2D(RoadTextureSampler, input.TextureCoordinates);								
	}	
	else {
		return tex2D(TerrainTextureSampler, input.TextureCoordinates);
	}
		
}

technique SpriteDrawing
{
	pass P0
	{
		PixelShader = compile PS_SHADERMODEL MainPS();
	}
};