weird bulging shading

I just downloaded a sweet ice texture, but i have some problems with it.

This is what it should look like:


However, when in game, it is rendered with ugly dark checkerboards. When the cubemaps are unbuild, you can see that the ice apparently "bulges" the light, which it should not

Here is the VMT:

"LightmappedGeneric"
{
"$basetexture" "Nature/Ice001"
"$bumpmap" "Nature/Ice001bump"
"$envmap" "env_cubemap"
"%keywords" "tf"
"$surfaceprop" "ice"
}

Click to expand...

The bump map does not display anything like this.

What could possibly be the cause of this little problem?

Yep. That was the cause.

Thanks you very much