problem with faces and light

I’ve just modeled a simple Companion Cube in blender and tried to export it for panda3d using blender 2.49 and chicken R91.

The result is that in 2 faces everything is all right but then in 4 faces edges and the circle in the middle are reacting to light the opposite they should.
Something like they get shiny when light is tangent and get dark when light is in front of them.

Normals seems to be fine and everything in general.
How can I solve this?

Thank you!

Everything is in here:

Export the model with angles (0,0,0)…I mean RotX=0, RotY=0 and RotZ=0
it works with me