analysis with the Force on MPC (Multiple point contraint)

Hi,

i've analized the Bracket at first with Forces direktly on nodes in the body. Everything was done good and i could see strain and stress in Hyperview. Then i've made a new node at the center of tube and connected it (as independent node) with all nodes in the tube (as dependent node). After that i've set a constant Force on the independent Node.But according to picture ''MPC_Hyperview'' nothing (displacement,stress, etc.) ist presented.

Where is my mistake ? as far as i know we use Indpt-node to distribute the force homogen/equal on dpt-nodes. 

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