Loading VertexShader removes all sprites? - xna

Question

I have a problem when I load my Vertex Shader in my effect file in XNA 4.0.
So without this row under it will work exact as I want.
VertexShader = compile vs_2_0 VertexShaderFunction();
So what have I done so far... Nothing really! :)
Load image and effect file.
protected override void LoadContent()
{
spriteBatch = new SpriteBatch(GraphicsDevice);
myTexture = Content.Load<Texture2D>("textures\\fan");
effect = Content.Load<Effect>("effects\\ashader");
}
Draw the image on the screen.
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.Black);
// Draw the sprite.
spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend);
effect.CurrentTechnique.Passes[0].Apply();
spriteBatch.Draw(myTexture, spritePosition,Color.White);
spriteBatch.End();
base.Draw(gameTime);
}
Shader
float4x4 World;
float4x4 View;
float4x4 Projection;
struct VertexShaderInput
{
float4 Position : POSITION0;
};
struct VertexShaderOutput
{
float4 Position : POSITION0;
};
VertexShaderOutput VertexShaderFunction(VertexShaderInput input)
{
VertexShaderOutput output;
float4 worldPosition = mul(input.Position, World);
float4 viewPosition = mul(worldPosition, View);
output.Position = mul(viewPosition, Projection);
return output;
}
float4 PixelShaderFunction(VertexShaderOutput input) : COLOR0
{
return float4(1, 0, 0, 1);
}
technique Technique1
{
pass Pass1
{
VertexShader = compile vs_2_0 VertexShaderFunction();
PixelShader = compile ps_2_0 PixelShaderFunction();
}
}
This should draw a red square where the texture is positioned. It does this without the VertexShader loaded. But when loading it, no textures shown at all.
So what have i missed?