Attenuation of point and spotlight

Hi!

I need attenuation values in forward add pass, but this script always returns 1:

UNITY_LIGHT_ATTENUATION()

What can be the reason?

Best, Andre

Edit:

I looked in the autolight file and this is the code:

 #ifdef POINT
 uniform sampler2D _LightTexture0;
 uniform unityShadowCoord4x4 _LightMatrix0;
 #define UNITY_LIGHT_ATTENUATION(destName, input, worldPos) \
     unityShadowCoord3 lightCoord = mul(_LightMatrix0, unityShadowCoord4(worldPos, 1)).xyz; \
     fixed destName = (tex2D(_LightTexture0, dot(lightCoord, lightCoord).rr).UNITY_ATTEN_CHANNEL * SHADOW_ATTENUATION(input));
 #endif

it seems, that SHADOW_ATTENUATION(input) is zero. But why... mabe because i pass 0 as input?