Particle settings invisible

Hello,

I would like to give my creation some hair by using a particle systems.
However, the Particle Settings field is empty (see screenshot). Even when I try to add a Particle Setting via the Modifiers, I can’t get into the particle settings.

Do you know how I can get to the Particle Settings?
Thank you!

Blender file: http://dl.dropbox.com/u/3523511/bert.blend

Screenshot:
http://dl.dropbox.com/u/3523511/Knipsel.JPG