Help with a LS DYNA compression test model

Hi

I amtrying to model a simple compression test om a foam cube with LS DYNA. I have tried a lot of different approaches but there is always something wrong in the model :(. I have managed to get on model up and running, but i am having problems with excessive penetrations! Do anyone have any idea how to fix this?

I have includef the .k file as a text file to this post.