Sorry, i can't speak german ;it must work in this way:

Action my_entity
{
Ph_setgravity ( vector(0,0,-386));

Phent_settype (my, ph_rigid, ph_sphere);
Phent_settmass (my, 10, ph_sphere);
Phent_setdamping (my, 50,50);
Phent_setelasticity (my, 50,100);
phent_setfriction(my,80);
//Phent_setgroup (my, 2);

}

Hope this help.