Usage of Fog

I’ve downloaded a snapshot(376) build from: panda3d.org/buildbot/builds/ … 13-376.exe and I tried to add fog to my scene but got only a set of warnings and the display kicked back into fix-function pipeline.
My code:

        render.setShaderAuto()
        #fog
        self.fog = Fog("global-fog")
        self.fog.setColor(1,1,1)
        self.fog.setExpDensity(0.002)
        render.setFog(self.fog)

Error message:

:gobj(error): created-shader: (128) : warning C7011: implicit cast from "float4"
 to "float3"
:gobj(error): created-shader: (21) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (125) : warning C7011: implicit cast from "float4"
 to "float3"
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (125) : warning C7011: implicit cast from "float4"
 to "float3"
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (125) : warning C7011: implicit cast from "float4"
 to "float3"
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (128) : warning C7011: implicit cast from "float4"
 to "float3"
:gobj(error): created-shader: (21) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (125) : warning C7011: implicit cast from "float4"
 to "float3"
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (125) : warning C7011: implicit cast from "float4"
 to "float3"
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (125) : warning C7011: implicit cast from "float4"
 to "float3"
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.
:gobj(error): created-shader: (19) : error C5041: cannot locate suitable resourc
e to bind parameter "l_slightcoord0"
:gobj(error): Shader encountered an error.

What am I doing wrong? Or did I just install a wrong version?