I'm trying to create PCF from my Shadows but when I perform PCF filtering I get always 0.0

SamplerComparisonState cmpSampler
{
   // sampler state
   Filter = COMPARISON_MIN_MAG_MIP_LINEAR;
   AddressU = MIRROR;
   AddressV = MIRROR;
 
   // sampler comparison state
   ComparisonFunc = LESS_EQUAL;
};

..............

float2 texOffset( int u, int v )
{
    return float2( u * 1.0f/2048.0f, v * 1.0f/2048.0f );
}

...............

//PCF sampling for shadow map
float sum = 0;
float x, y;	
//perform PCF filtering on a 4 x 4 texel neighborhood
for (y = -1.5; y <= 1.5; y += 1.0)
{
        for (x = -1.5; x <= 1.5; x += 1.0)
	{
		sum += localShadowTextures[1].SampleCmpLevelZero( cmpSampler, input.localLightViewPosition.xy + texOffset(x,y), input.localLightViewPosition.z );			
	}
}
float shadowFactor = sum / 16; // <--- no matter what i always get a 0 here.

texOffset() takes ints, youre passing floats and returning floats?

Are you creating your device with the D3D11_CREATE_DEVICE_DEBUG flag and checking for warnings/errors in your debugger output? It's possible that you messed something up when creating the sampler state, and that's screwing up the shader.

I donot have D3D11_CREATE_DEVICE_DEBUG flag. Also I dident create sampler state for "cmpSampler" or you mean SamplerComparisonState ?

texOffset() takes ints, youre passing floats and returning floats?

good point, but this don't solve the problem.

Does anyone have any idea what is wrong with the SamplerComparisonState ?

Are you creating your device with the D3D11_CREATE_DEVICE_DEBUG flag and checking for warnings/errors in your debugger output? It's possible that you messed something up when creating the sampler state, and that's screwing up the shader.

I donot have D3D11_CREATE_DEVICE_DEBUG flag.

You should always, always, *always* be using it for debug builds. Always.

only if i knew how to use this debug thing